To add what FJ posted, when we dyno'd 455HO's back in the days before we understood what tight quench did and the actual static compression was lower 8's (8.0 to 8.3 range) the best power was in the 42 - 44 degree range all in by 2500 rpm. But that was probably with 93 octane 100% gasoline (no ethanol). The RAIV's liked 36-38 degrees all in by 3000 rpm with a minimum of 100 octane blends of real gas.
Dennis
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