Got the pan off, went over EVERYTHING with a fine-toothed comb. Cannot find anything hitting or rubbing. Decided to move forward and swap camshafts and lifters.
That said, if anyone needs a good cam for a big block... I have one, barely used. It's a Crane Blueprint cam - tweaked for the pure stocks. The application is 350 & 360 HP 396, 385, 390, & 400 HP 427, and 70' - 72' LS5 454. It's a small cam by most standards, but packs some extra power due to the tweaks. I swapped to something slightly bigger that still fits the rules - in search of a few extra jigga watts.
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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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