I've done two Clydesdale builds, one not-so-great, and one quite great.  

The not-so-great was on a '91 MB-2.  The fork made the handling floppy 
unweighted and I would notice a slight shimmy when rolling down hills, both 
with a load and without.  I wish I would have tried different bars with 
it-- I was running the Fairweather Bullmoose, which have a much shorter 
reach than I usually run.  But oddly enough (for me), I didn't experiment, 
and left it to languish until put the MB-2 back into rotation with its 
original fork.  (Note: the wheel in the photo was a spare and not the one 
on which the aforementioned observations were based on.)

The great is on a '88 (I think) Rockhopper.  Unloaded this build handles 
almost spot on to the original, and can take a 2 grocery bag load like a 
champ.  No flop or shimmy at all.  I can even ride it no handed (unloaded), 
which I wouldn't dare attempt on the previous build.  I can't pretend to 
know why this one works, but it confirms all the rave reviews this fork 
inspires.