Hey guys, I did a search of quench and still have questions. I am assemblying a 40 over 5.7L sbc for my daily driven '86 shortbed GMC pickup. My Speed Pro flat top forged pistons are .028 down in the cylinder. With 64cc Alum heads, 6.10 dish, and a .040 head gasket my compression ratio is a street friendly 9.65. I'm worried about the .068" quench factor. My machinist says I have nothing to worry about. My search reveals you guys say anything over 040 is asking for trouble. Doing a spec. search for a '78 5.7L shows a deck height of 9.0315" and piston protusion of .025" below deck. Am I reading this as a stock quench of.065"? Should I go with .015" steel head shim in a street truck?
Thanks