Being hydraulic roller, I wouldn't worry too much. You can buy zinc additive at most parts stores if you are still concerned. Just make sure you prime the oil pump before start up.
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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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