even on aftermarket blocks there have been some issues with the 4.75 (hooter) has some street car experience and went with a 4.65 during a rebuild, i think. the .1 difference is a lot of piston left in the bore. I believe there are more than a few RACERS that are in that 4.75 range. Wasn't that tall deck Alaskan gto even larger with a billet crank, many moons ago?
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1969 carousel red firebird 455, richmond 5 speed
1964 540 gto
1971 lemans sport convertible
1972 Maverick under slow construction
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