Good break on the heads, but it still has dished pistons. That = low compression. Run a short duration camshaft with a decent amount of lift. It will increase the DCR and make more power than a large by huge cam with lots of overlap.
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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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