Fascinating. My initial reaction was to wonder if setting it up at cranking speed would correlate to dynamic compression running speed... but that sort of fine-tuning certainly can't hurt. Especially with a lumpy cam like you describe.

With a stock cam, I have attempted a similar goal by using slightly increased (an extra .005" or so) spark plug gaps on cylinders where compression numbers were a tiny bit lower (10 psi or so.) Unfortunately, I never had any diagnostic equipment capable of telling me whether it worked any better-- it just sort of seemed like a good idea-- and when I got lazy and stopped doing it, I couldn't tell that the engine ran any less smoothly. Maybe 0.005 wasn't enough. Has anyone ever tried this, with stronger conclusions than mine?

- Erik

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Lots of early Valiants and Barracudas have crossed my path.
Also a handful of other toys for variety now and then.