Originally Posted by DrVette
Aren't the 5.7L - Vortec Combustion chamber volume 64cc ?
and the 5.7L - 87-95 TBI heads 76cc ?
You are quite correct this would resolve a major hurdle, however it would take a competent machine shop to shave the heads on an "angle-cut" to resolve the major lack of compression.
Sorry, for the lack of understanding the adapter from MPFI to TBI deal
Edit to say:
Thanks guys for the lack of lighting me up with a 55gl trash bag full of acetylene
Interpretation, thanks for not Flaming Me as a N00b here
A need to check the head casting; there are two variations of the swirl port the 14102191 has a 76 cc chamber but is usually only found on 3/4 ton with tow package and heavier trucks with the 190 horse 350. The 14102193 casting is found on 1/2 ton models and 3/4 ton without tow package with the 207 horse 350. Other than the heads the engines are the same except the 207may have 2 or 4 bolted mains where the 190 will only be 4 bolt mains. But GM is given to some inconsistancy so looking at the part is the only positive way to be sure.