[GMCnet] Intake crossover repair

[Jerry Burt]

I'm going to pull my intake because of oil leaks front and rear. I've done a search on crossover repair in case my intake is cracked. It appears the
intake has been off before, bulging silicon for valley seals, so I don't know what I will find. Still trying to locate some history on the drive
train.

Back in 2015 Peer had a discussion with Dick Patterson about crossover block-offs and crack repair options. I didn't see any followup on Peer's tests.
I'm wondering if there were any results or if there are any new procedures.


--
Patti & Jerry Burt
73 Gmc 26' Canyon Lands -
Photos - http://jburt.smugmug.com/GMC-Motorhome
Lots of upgrades but lots to do to make it ours.
Members: FMCA - GMCMI - GMCWS - Pacific Cruisers - 49ers

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[Rob Mueller]

Jerry,

If you block the crossover the temperature in that area will drop from 1100+
degrees Fahrenheit to that of the oil vapors in the area (around 170) or
that of the oil itself (around 250). I have a photo that Dick sent to me
showing a laser temp sensor "shooting" the temp through the choke stove port
to the bottom of the plenum and it is reading 173F.

The surface of the plenum under the carb would be even less as the gasoline
in the intake air vaporizes.

Regards,
Rob M.
The Pedantic Mechanic
USAussie - Downunder
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808

-----Original Message-----
From: Jerry Burt

I'm going to pull my intake because of oil leaks front and rear. I've done a
search on crossover repair in case my intake is cracked. It appears the
intake has been off before, bulging silicon for valley seals, so I don't
know what I will find. Still trying to locate some history on the drive
train.

Back in 2015 Peer had a discussion with Dick Patterson about crossover
block-offs and crack repair options. I didn't see any followup on Peer's
tests.
I'm wondering if there were any results or if there are any new procedures.

--
Patti & Jerry Burt

[James Hupy]

The contrast, or difference in temperatures, within the casting is what is
responsible for cracking. That and the loss of carbon and other elements
from the erosion of the casting due to application of exhaust gasses laden
with combustion byproducts starved for oxygen. EXCEPT IN COLD WEATHER,
there is no down side to blocking the crossover.
Jim Hupy
Salem, Or
78 GMC ROYALE 403

[Tyler]

I pulled my 1975 intake two weeks ago to put in the Paterson blockoff kit I bought over a year ago. Visible cracks on the bottom. Called Dick last
week and he said put it back together with the stainless block offs I already had, that the cracks shouldn't even open up after they don't get the
exhaust heat. Google Springfield Ignition for his contacts, he is one of the most helpful people ever.
--
1975 Glenbrook, 1978 Royale rear bath
Raleigh, NC

[Jerry Burt]

Thanks for the feedback everyone.
I have a second intake that is cracked in the secondary web and into the lifter valley. I had been wondering if I couldn't groove and fill the lower
crack with high temp Liquid Steel but was concerned about it possibly falling out. I think I'll leave them and see how that goes.

Rob, I'm sorry, I said it was Peer and it was your posts in this thread:
http://gmc.mybirdfeeder.net/GMCforum/index.php?t=msg&goto=274926&rid=5019&srch=intake+manifold+repair#msg_274926
I was wondering if you had followed up with those experiments.

Thanks again All.

[A.]

pjburt wrote on Mon, 10 April 2017 22:02

> I'm going to pull my intake because of oil leaks front and rear. I've done a search on crossover repair in case my intake is cracked. It appears
> the intake has been off before, bulging silicon for valley seals, so I don't know what I will find. Still trying to locate some history on the drive
> train.
>
> Back in 2015 Peer had a discussion with Dick Patterson about crossover block-offs and crack repair options. I didn't see any followup on Peer's
> tests. I'm wondering if there were any results or if there are any new procedures.

No new procedures. While you got it off, block the crossover with the stainless steel plate kit and add an electric choke.

Jim K (AppliedGMC) has everything you need. 1-800-752-7502

--
73 23' Sequoia 4 Sale
73 23' CanyonLands Parts Unit 4 Sale
Upper Alabama
"When I grow up I am going to be a curmudgeon."

[Chris Tyler]

Since manifold cracking is a common problem on our application, I have to wonder: Is it a problem with the lower profile manifolds? Is it common on
Toronados?

I dont remember hearing about it being a common olds V8 isssue across the board.
--
76 Glenbrook

[James Hupy]

Do yourself a favor and stop reading the "hot rod Oldsmobile forum".
455 Oldsmobiles used in GMC"S have a huge load on them compared to a
4-4-2 or a Cutlass Supreme or a Toronado.
The exhaust gasses from a GMC are much greater in volume as well as
temperature, due to the 12,000 pound weight of the coach. The coolant and
oil temperatures are much hotter as well. These extremes are what Crack
manifolds.
Jim Hupy

[Jerry Burt]

A Hamilto wrote on Tue, 11 April 2017 14:15

> pjburt wrote on Mon, 10 April 2017 22:02
> > I'm going to pull my intake because of oil leaks front and rear. I've done a search on crossover repair in case my intake is cracked. It
> > appears the intake has been off before, bulging silicon for valley seals, so I don't know what I will find. Still trying to locate some history on
> > the drive train.
> >
> > Back in 2015 Peer had a discussion with Dick Patterson about crossover block-offs and crack repair options. I didn't see any followup on
> > Peer's tests. I'm wondering if there were any results or if there are any new procedures.
> No new procedures. While you got it off, block the crossover with the stainless steel plate kit and add an electric choke.
>
> Jim K (AppliedGMC) has everything you need. 1-800-752-7502

Thanks for the update. The block-off gaskets, electric choke, and a Patterson distr. w/plugs and wires are going in. While I'm at it, a new thermostat
and Jim Ks insulated, flex gas line will go in also.

--
Patti & Jerry Burt
73 Gmc 26' Canyon Lands -
Photos - http://jburt.smugmug.com/GMC-Motorhome
Lots of upgrades but lots to do to make it ours.
Members: FMCA - GMCMI - GMCWS - Pacific Cruisers - 49ers

[Jim Kanomata]

We sell lot of these Patterson Block of plate kits.
We also supply the Electric choke which you'll need along with the plastic
electrical connectors.

--
Jim Kanomata
Applied/GMC, Fremont,CA
ji...@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502

[David]

So I probably did not do enough research on this subject I'm confused about the difference between the "Patterson" block off and something I just
bought from Jim B in Florida with stainless steel plates and a mr. Gasket gasket. Are they the same thing? Did I just throw money away looking for
some answers I have a 78 403. That lost some coolant overheated and I am in the process of replacing the head gaskets and the intake gaskets and I'd
like to reduce the Heat looking for some advice thank you
--
'78 Palm Beach car nut & new to RV'ing
26 ft. 403 OEM wheels, 2 ACs, Pod, ladder, macerator
On FaceBook as David Martin Servati
585-953-53OO call or text

[roy keen]

Dick's gaskets are thinner then mr gasket I believe. I used mr gasket which will work fine for you. Some folks prefer the thicker gaskets some prefer
the thinner ones. If your hands have been surfaced thicker may be better.
--
Roy Keen
Minden,NV
76 X Glenbrook

[David]

How does one install the block off plates do they "glue" onto the gasket or do they "glue" onto the intake manifold and the gasket goes over that?

--
'78 Palm Beach car nut & new to RV'ing
26 ft. 403 OEM wheels, 2 ACs, Pod, ladder, macerator
On FaceBook as David Martin Servati
585-953-53OO call or text

[Jerry Burt]

Jim K - I'm putting together a list and will give Nick a call.

roy1 wrote on Tue, 11 April 2017 19:21

> Dick's gaskets are thinner then mr gasket I believe. I used mr gasket which will work fine for you. Some folks prefer the thicker gaskets some
> prefer the thinner ones. If your hands have been surfaced thicker may be better.

I have 70 years of surfacing my hands. Does that mean I need the thicker gaskets? :roll:

--
Patti & Jerry Burt
73 Gmc 26' Canyon Lands -
Photos - http://jburt.smugmug.com/GMC-Motorhome
Lots of upgrades but lots to do to make it ours.
Members: FMCA - GMCMI - GMCWS - Pacific Cruisers - 49ers

[Jim Kanomata]

There is nothing wrong with a thicker gasket as long as the plate seals
properly.
David, we recommend using a High Temp sealant around the plate and blue or
black sealant around the water passage.
I tend to over torque the intake manifold to assure good seal.

--
Jim Kanomata
Applied/GMC, Fremont,CA
ji...@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502

[Dennis Sexton]

dservati1 wrote on Tue, 11 April 2017 21:48

> How does one install the block off plates do they "glue" onto the gasket or do they "glue" onto the intake manifold and the gasket goes over that?

SteveF has a great photo album on rebuilding a 455 .. look at this photo about the SS block from ft plates.
He glues them to the head.

http://www.gmcmhphotos.com/photos/olds-455-engine-rebuild/p1238.html

Hope this helps.

Dennis
--
Dennis S
73 Painted Desert 230
Memphis TN Metro

[Jerry Burt]

Dennis S wrote on Tue, 11 April 2017 21:02

> dservati1 wrote on Tue, 11 April 2017 21:48
> > How does one install the block off plates do they "glue" onto the gasket or do they "glue" onto the intake manifold and the gasket goes over
> > that?
>
>
>

> SteveF has a great photo album on rebuilding a 455 .. look at this photo about the SS block of plates.

> He glues them to the head.
>
> http://www.gmcmhphotos.com/photos/olds-455-engine-rebuild/p1238.html
>
> Hope this helps.
>
> Dennis

Thanks for SteveF's link Dennis. I had forgotten about it.

--
Patti & Jerry Burt
73 Gmc 26' Canyon Lands -
Photos - http://jburt.smugmug.com/GMC-Motorhome
Lots of upgrades but lots to do to make it ours.
Members: FMCA - GMCMI - GMCWS - Pacific Cruisers - 49ers

[Jim Kanomata]

Weight is a factor,but the air drag is also a great load that is there

Get Outlook for iOS<https://aka.ms/o0ukef>
________________________________
From: Gmclist <gmclist...@list.gmcnet.org> on behalf of James Hupy <james...@gmail.com>
Sent: Tuesday, April 11, 2017 2:36:03 PM
To: gmc...@list.gmcnet.org
Subject: Re: [GMCnet] Intake crossover repair

[roy keen]

Damn spell check

--
Roy Keen
Minden,NV
76 X Glenbrook

[Chris Tyler]

[quote title=James Hupy wrote on Tue, 11 April 2017 16:36]Do yourself a favor and stop reading the "hot rod Oldsmobile forum".

455 Oldsmobiles used in GMC"S have a huge load on them compared to a
4-4-2 or a Cutlass Supreme or a Toronado.
The exhaust gasses from a GMC are much greater in volume as well as
temperature, due to the 12,000 pound weight of the coach. The coolant and
oil temperatures are much hotter as well. These extremes are what Crack
manifolds.
Jim Hupy

I don't.
I agree its a far higher load. However , I dont recall a problem with cracked intakes on SOBs with chevy 454s which have even heavier loads and far
worse aerodynamics. Do they have a heavier cast manifold?
I dont recall them looking much different than passenger or truck manifods other than the 'Peanut port' size.
Exhuaust manifolds are another story entirely.

[James Hupy]

Olds intake manifolds have huge crossover exhaust passages right next to a
cold fresh air/fuel passage. Other GM cars have crossover exhaust passages
but, they are much smaller than the olds. The olds has what is commonly
called a siamese center exhaust port with a huge passage through the center
of the cylinder head that connects to the intake manifold. I have several
NON TORONADO intake manifolds in my shop that are not dropped carb flange
intakes. They show cracks on the floor of the manifold just like the
toronado manifolds do. One of them I used for welding practice using
different methods and from that futile experiment (unsuccessful )
determined that they are generally NOT WELDABLE. So, block off plates are a
workable solution.
Other GM intake manifolds that are made of the same alloy of cast iron
(low nickel, low molybdenum, high carbon content) are also prone to
cracking. The high nickel content of the engine blocks themselves provides
some protection against cracks, in my experience. Just the way it is, I
guess.

Jim Hupy
Salem, Or
78 GMC ROYALE 403

[Jim Kanomata]

​The SOB units run a much lower gear ratio of 4.56-4.78, so the load is not
so great as lugging the unit with a 3.07.
Also the Olds 455 and 403 has proportionately larger exhaust cross over
than the Chevy engines.​

--

Jim Kanomata
Applied/GMC, Fremont,CA
ji...@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502

[Jerry Burt]

jimk wrote on Tue, 11 April 2017 16:43

> We sell lot of these Patterson Block of plate kits.
> We also supply the Electric choke which you'll need along with the plastic
> electrical connectors.

> --
> Jim Kanomata
> Applied/GMC, Fremont,CA
> ji...@appliedairfilters.com
> http://www.appliedgmc.com
> 1-800-752-7502
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

Jim - It looks like I'm going to have to delay that order.
I'm going to have to go deeper than I anticipated. The engine has been running smoothly after initial startup. The rough running at startup I
attributed to running a little rich when cold. After a minute, it cleared up and ran so smooth it was hard to tell it was running at idle.

I decided to do a cold compression test before I took it apart. #1,3,5,7,2, and 4 cyls are at 150 psi - #6 at 140 psi and #8 at 60 psi. I had an
exhaust leak that turned out to be the exh gasket between #6 and #8 which I fixed. I'm going to do a leak down test tomorrow. There is no sign of
fluid loss, coolant in the oil or smoke so, I'm hoping it is exh valves.

--
Patti & Jerry Burt
73 Gmc 26' Canyon Lands -
Photos - http://jburt.smugmug.com/GMC-Motorhome
Lots of upgrades but lots to do to make it ours.
Members: FMCA - GMCMI - GMCWS - Pacific Cruisers - 49ers

[Bill Wevers]

My neighbor is a heavy equipment welder, taught me how to weld cast iron.
I used nickel welding rods, weld a little at a time, without too much heat.
And hammer on the weld to relieve stress as it cools.

I've been running this manifold for a few years.
Here's a link to the photo.

http://www.gmcmhphotos.com/photos/mechanical/p62724-manifold-repair.html
--
Bill Wevers GMC49ers, GMC Western States
1975 Glenbrook - Manny Powerdrive, OneTon
455 F Block, G heads
San Jose

[James Hupy]

Bill, I know that high nickel content welding rod, when used at low
amperage heats in short passes is effective on cast iron. And, if the
casting has minimal cracking, that will hold up for a long time.
But, if cobweb cracking is present like the Olds manifolds frequently
are, chances for success are slim. Blocking off the crossovers will help
prevent further cracks, but, if they go through the floor of the inlet
runners, you will still have vacuum leaks and oil consumption. But, if
yours is working well, good on ya, as Rob M. says.
Jim Hupy

[Larry]

If you have access to a foundry, an option may be to pour and fill the crossover with aluminum. Look through these pics. Will give you an idea on
how to handle this.

http://www.gmcmhphotos.com/photos/g4571-pouring-the-455-crossover.html

http://www.gmcmhphotos.com/photos/cad-500-intake-manifold/p12341.html

JWID



--
Larry
78 Royale w/500 Caddy
Menomonie, WI.

[Steve Southworth]

If you have an urge to try this to repair your cracked cast iron manifold get some practice first. HIt the men's mall and pick up some iron manifolds
t practice on. The Way i was shown s to heat the iron hot, weld it and bury in hot sand. By hot I mean very hot, hotter the better. Or if I had to
do it I would find someone who knows how.

If you do practice, practice, practice and learn to do it, it is a great skill to have. Note the need for nickel welding rods.

No, I am not an expert but had one as a teacher. Haven't had the time or the need to do the practice.

Do note Paterson's advice that it is not needed if the crossover is blocked.

SteveS

bwevers wrote on Fri, 14 April 2017 11:21

> My neighbor is a heavy equipment welder, taught me how to weld cast iron.
> I used nickel welding rods, weld a little at a time, without too much heat.
> And hammer on the weld to relieve stress as it cools.
>
> I've been running this manifold for a few years.
> Here's a link to the photo.
>
> http://www.gmcmhphotos.com/photos/mechanical/p62724-manifold-repair.html


--

Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI

[Jerry Burt]

Larry - Thanks. I've studied your photos before while doing my research.

Larry wrote on Fri, 14 April 2017 09:59

> If you have access to a foundry, an option may be to pour and fill the crossover with aluminum. Look through these pics. Will give you an idea
> on how to handle this.
>
> http://www.gmcmhphotos.com/photos/g4571-pouring-the-455-crossover.html
>
> http://www.gmcmhphotos.com/photos/cad-500-intake-manifold/p12341.html
>
> JWID

Jim - I was leaning toward just using the Paterson intake gaskets but now you got me concerned about the spiderwebing. I have my extra manifold being
hot tanked now and will be tearing the engine down next week. Maybe I'll get lucky and the intake on the engine will be pristine. (Yeah, Riiight) The
intake and exhaust manifolds have been off before. So I'm hoping for some decent news after the heads come off.

It looks like Bill Wevers has his crossover filled also.

James Hupy wrote on Fri, 14 April 2017 09:53

> Bill, I know that high nickel content welding rod, when used at low
> amperage heats in short passes is effective on cast iron. And, if the
> casting has minimal cracking, that will hold up for a long time.
> But, if cobweb cracking is present like the Olds manifolds frequently
> are, chances for success are slim. Blocking off the crossovers will help
> prevent further cracks, but, if they go through the floor of the inlet
> runners, you will still have vacuum leaks and oil consumption. But, if
> yours is working well, good on ya, as Rob M. says.
> Jim Hupy

--
Patti & Jerry Burt
73 Gmc 26' Canyon Lands -
Photos - http://jburt.smugmug.com/GMC-Motorhome
Lots of upgrades but lots to do to make it ours.
Members: FMCA - GMCMI - GMCWS - Pacific Cruisers - 49ers

[Ken Henderson]

Or, you could try doing it yourself. It worked well for me 10 years ago,
but I don't know if Mondello still sells the zinc. Some have reported
using old aluminum pistons -- I'm not sure my fish cooker would be hot
enough for that:

http://www.gmcmhphotos.com/photos/g3115-plugging-intake-manifold-exhaust-crossover.html

Ken H.

[A.]

bwevers wrote on Fri, 14 April 2017 11:21

> My neighbor is a heavy equipment welder, taught me how to weld cast iron.
> I used nickel welding rods, weld a little at a time, without too much heat.
> And hammer on the weld to relieve stress as it cools.
>
> I've been running this manifold for a few years.
> Here's a link to the photo.
> http://www.gmcmhphotos.com/photos/mechanical/p62724-manifold-repair.html

40 years ago I knew a place that welded cast iron engine parts. They knew what they were doing. I saw a head that looked like a jigsaw puzzle that
they put back together, running a sawmill. If there were still places like that around, that would be the fix. But these days, nobody does that. The
stainless steel plates held in place by the gaskets are the best we can do.

--
73 23' Sequoia 4 Sale
73 23' CanyonLands Parts Unit 4 Sale
Upper Alabama
"When I grow up I am going to be a curmudgeon."

[Jerry Burt]

Ken H - Your series is another I looked at. Filling the crossover is still a possibility but welding is not going to happen. Cost vs an Applied GMC
replacement ($350) will be the major criteria.

--
Patti & Jerry Burt
73 Gmc 26' Canyon Lands -
Photos - http://jburt.smugmug.com/GMC-Motorhome
Lots of upgrades but lots to do to make it ours.
Members: FMCA - GMCMI - GMCWS - Pacific Cruisers - 49ers

[Advanced Concept Energy Solutions]

I think I might have missed something but there must be plenty of old , perfectly good intake manifolds that were replaced by aluminum ones , that are looking for a good home. I have one that you can have for the cost of shipping. I have found JB weld fixes almost anything if applied properly. I built up the exhaust ports on my 403 after they were undercut by leaks and JB weld held up for over 50k miles and 11 years until I sold my Royale.

Jon Darcy ACES
North Jersey 76 stretch, flares, 4 bag, Alcoa's, bunkhouse,MAC Dash,Manny Trans, FiTech FI,Honda 6010

[Jerry Burt]

I would love it. If you can put it on a Greyhound to Fresno, CA. Let me know what it costs and will send you a check or PayPal it. you either take it
to the depot or they will pickup. I can pick it up from the Fresno Depot no problem. I can send you a check or PayPal is faster. Let me know. you can
call me: 5five nine . six 8 one one three 21

Advanced Concept Ener wrote on Fri, 14 April 2017 15:44

--
Patti & Jerry Burt
73 Gmc 26' Canyon Lands -
Photos - http://jburt.smugmug.com/GMC-Motorhome
Lots of upgrades but lots to do to make it ours.
Members: FMCA - GMCMI - GMCWS - Pacific Cruisers - 49ers

[Rob Mueller]

Actually not as there is no reason to replace the OEM cast iron manifold
with the aluminum manifold unless it is cracked. The aluminum manifold is a
direct copy of the cast iron manifold.

Somewhere there is a photo sequence showing how it was designed.

Regards,
Rob M.
The Pedantic Mechanic
USAussie - Downunder
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808

-----Original Message-----


I think I might have missed something but there must be plenty of old ,
perfectly good intake manifolds that were replaced by aluminum ones , that
are looking for a good home. I have one that you can have for the cost of
shipping. I have found JB weld fixes almost anything if applied properly. I
built up the exhaust ports on my 403 after they were undercut by leaks and
JB weld held up for over 50k miles and 11 years until I sold my Royale.

Jon

[Rob Mueller]

Or plug it with Hardblok which is what drag racers fill engine blocks with.

Regards,
Rob M.
The Pedantic Mechanic
USAussie - Downunder
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808


-----Original Message-----

From: Gmclist [mailto:gmclist...@list.gmcnet.org] On Behalf Of Ken
Henderson
Sent: Friday, April 14, 2017 1:06 PM
To: gmc...@list.gmcnet.org
Subject: Re: [GMCnet] Intake crossover repair

[Gary Mau]

I have the intake manifold that Larry W. filled the crossovers with aluminum and am willing to sell it for $50 plus shipping. Contact me at
iagmc-at-yahoo dot com.
--
Gary Mau
X76 Royale
Davenport, IA

[Advanced Concept Energy Solutions]

Jerry I changed the intake manifold after I installed the FiTech because of the terrible mismatch of the intake to the injection system. The Engine performed noticeably smoother with the Edlebrock than with the stock intake. As far as Greyhound is concerned there are no stations around here where it doesn't cost lots in tolls and unspeakable amounts in parking just to get to and drop it off. PA bus terminal is closest (25 miles). Parking in NY port Authority bus terminal is $45.00, Lincoln Tunnel is $15.00, NJ turnpike is $2.75, Garden State Parkway is $9.00 plus half day of my time getting in and out. I can try and send UPS , Fed X, or Post Office. When you get it you will have to clean it out as it has been sitting out all winter.

Jon Darcy ACES
North Jersey 76 stretch, flares, 4 bag, Alcoa's, bunkhouse,MAC Dash,Manny Trans, FiTech FI,Honda 6010

[Jerry Burt]

Advanced Concept Ener wrote on Sat, 15 April 2017 17:30

Ouch... Thanks for the offer but I think I'll pass. The weight of those intakes pretty much precludes shipping them UPS, FedEx, or USPS. Greyhound, if
convenient, would be bad enough. I think I'll just deal with the ones I have here. It will probably be cheaper in the long run.


Thanks again.

--
Patti & Jerry Burt
73 Gmc 26' Canyon Lands -
Photos - http://jburt.smugmug.com/GMC-Motorhome
Lots of upgrades but lots to do to make it ours.
Members: FMCA - GMCMI - GMCWS - Pacific Cruisers - 49ers

[Jerry Burt]

Gary Mau wrote on Fri, 14 April 2017 21:16

> I have the intake manifold that Larry W. filled the crossovers with aluminum and am willing to sell it for $50 plus shipping. Contact me at
> iagmc-at-yahoo dot com.

Gary - Thanks for the offer but I think I'll pass. The weight of those intakes pretty much precludes shipping them UPS, FedEx, or USPS. Greyhound, if
convenient, would be bad enough. I think I'll just deal with the ones I have here. It will probably be cheaper in the long run anyway.

I just did a power-wash on the engine today.
It is going to be interesting finding out what is in this thing. I still can't see the block number yet. Serial numbers show I have a '77 Cad Trans
and a '75 Non-Cal carb. The intake was painted competition orange then gloss black and the crossover didn't seem to be any hotter than rest of the
intake after I pulled it from the wash-rack to the stall. The block has no paint and the pan has peeling black paint.

I'll start the tear down tomorrow. No reason to work on a hot engine.
The treasure hunt begins. :)

--
Patti & Jerry Burt
73 Gmc 26' Canyon Lands -
Photos - http://jburt.smugmug.com/GMC-Motorhome
Lots of upgrades but lots to do to make it ours.
Members: FMCA - GMCMI - GMCWS - Pacific Cruisers - 49ers