For my W72 build i installed a Melling Spc-4 (066) but installed it at 112 ICL using a mopar key. this is what DD2000 showed as a good place to act like the W72 cam. I'm very happy with the results. I do have Doug's headers and dual exhaust which i'm sure helps a lot, but it feels like it has power everywhere up to 5,000 rpm. It surprised me for a low compression nothing special build.
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1979 Firebird Trans Am 301/4spd (Now 428)
1977 Firebird Formula 400/Auto
2007 Grand Prix GXP 5.3L
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