I finished putting the 5.3L together for my fathers 63 Chevy II convertible. Cam change, and an F Body oil pan swap, along with new gaskets. I put a very mild "truck" cam in it that requires no valve spring or pushrod upgrade. It will run great in that light car.
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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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