340 Rebuild "Musts"

bush the oil gallery for a street engine?....lol
positive deck height of .040 to .050 for street engine...maybe .018...


With solid lifters, yes. I've done it since the mid 1980's. No need to have oil leak at the lifters.

.018 won't even get you 9.5:1 if using .039 or thicker head gaskets. The blueprint max is .054 positive, but that was with a .020 shim gasket IIRC.

They have to be positive with OEM heads. Most guys don't actually calculate CR and have way less than they think.