I had 4 cams in my RAIV 400 when running NMCA. the 288/296 UD on a 108, the UD 304/312 on a 112(first retarded 4 degrees for more V-P then advanced like Harold said to do-ran the same to the 0.01sec), UD SFT 288/292 on a 110 and finally a Comp reverse split 292/288(? I'll look at the card) HFT on a 110. The reverse split ran the best. The 304/312 on a 112 lost little open headers to mufflers the 288/296 on the 108 picked up around 0.2 uncorked. Not dyno comparison but a lot of track runs and a consistent car some taking class record or wins in the Top Stock NMCA class.
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Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune 13.43@103.4
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
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