What kind of camshaft? Hyd FT? SFT? Hyd roller? Solid roller? It shouldn't be any different unless you put a tight lash style cam in it. (Usually a Solid roller) Then it would just require less lash as the name implies. I would contact the camshaft manufacturer and see what they recommend.
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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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