When I put in my SGII, my temps around town were 204-216. This was on what
I believe was stock radiator, fan clutch, water pump, thermostat. First
thing I did was replace the fan clutch with a new one (blue) from Cdan. Its
called the blue one since part of it is painted blue. My water temp dropped
to 198-200. After I replaced the radiator with the older (new oem though)
brass style, thermostat, waterpump, all associated hoses, and flushed the
system several times, my water temp is now running at 186-188 according to
SGII. I am still running distilled water as I am going to put in the
coolant filter as shown in a mud post. I figured there was no sense in
wasting coolant or money.
So, with that being said, the fan clutch is a pretty easy job and will show
results if yours is on the way out. The PHH is a pain in the ass. That's
all I will say about that.
I am waiting (still and patiently)to get my truck back from the tranny/gear
shop so I can finish the coolant filter project, fab up the winch control
for my m12000 in the arb bar, and a few other odds n ends.
Is your 80 supercharged? I don't see there being a need for an auxiliary fan
if your cooling system is up to snuff.
Jon.