Halt, go no farther!!!! This is where we separate the GMC guys from the Chevy guys-LOL. He is talking a GMC engine not Chevy. GMC exhaust valves were cooled by water nozzles in the cylinders and water probably got into the cylinders over time. That gets things
REAL rusty in the cylinders. I did this on my 308 six in my 45 GMC COE in 1980 and it is still running today with over 300,000 miles on it. Radley, contact me via email and I will tell you exactly what you need to do. GMC built a far better engine then Chevy if the truth be known. You will be further ahead if you fix that engine and it shoudn't cost you much at all. Maybe a few gaskets. Sounds like a cool, fun truck you have there. Fix it don't butcher it!! My email is
[email protected] .
