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Here we go again guys!
I'm going to need some info from you Cleveland folks to make sure we are doing something stupid.
1: head gasket was on properly - not the problem.
2: Head was removed and vacuum checked - perfect % leaks
There is also no signs of valve contact on pistons.
3: The rocker system was missing the shims that fit under the
fulcrum to avoid contact with VS retainer but that is now fixed
and didn't solve the compression issue.
4: We are now replacing the timing chain, cam, and lifters.
5: We also think it has to be timing - any more thoughts since the
obvious is already passed inspection.
6: What is the firing order for a 1972 351 Clev.?
7: What intial & total timing is a benchmark for a stock engine?
8: What should the cyl. compression be on a cold & stock motor?
Our good side ranges between 128-130.
Thanks again for your help in I'm sure we can't be far away - there isn't much left!
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