I still don't understand why an open chamber (074) cylinder head is being used on this engine, when all the 1970 big block L78/L89 production engines would have used a closed chamber (842) head and piston combo to come up with the designed 11.25:1 compression ratio?????
What am I missing here???
__________________
Rick
69 Chevelle SS396 Silver L78 M21 Post Sedan (Berger Chev.)
69 Chevelle SS396 Black L78 4-speed 4.10 Post Sedan
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