I have a set of 98cc 66' oval port heads if you are interested. Those with a set of .020" thick head gaskets will bump your compression quite a bit. Your cam is VERY conservative for a 454. I also have a NIB 228/238 @ .050" Hyd cam. 114 LSA, .540" lift. Had planned to use those parts on my father's car, but he changed his mind and is having me put it back to stock.
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1972 SS 454 Chevelle LS5/M21/12 bolt 3.73 posi
1969 Malibu COPO L72/M20/12 bolt 3.31 posi
1968 Malibu LQ9/4L80E/12 bolt 3.73 posi
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