[bigmike]

I find this post to be a painfull flashback....I fought overheating with my Shell Valley for 5 years. I was running a 427 SO that I bought "rebulit". I tried everything : coolant mix, timing, monster radiators, shrouds, etc., etc.. Finally, out of desperation, my wife told me to just to buy a new engine (love that woman). I bought a genesis aluminum short block, and moved all of my goodies from the iron FE over to it. It warmed up to 200°, and stayed there forever, no matter what. An autopsy on the iron block indicated that it had been overbored to the point that the cylinder walls were only .032" thick! I never had a chance.