i dont know & am curious, but wouldnt .15 increase in lift & duration be like stepping up to a bigger cam? if the heads & intake can support the extra lift shouldnt that be worth some decent power?
i have the OF cam that is similar to yours in a 467, i recall that the .575ish lift went to .600+ & added a couple or 3 degrees of duration with 1.65 rockers vs 1.5.
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