Ok so when the throttle is open, manifold vacuum will be low and the gram/cyl flow will be high. On a carb/distributor engine, the lack of vacuum at wot will cause the vacuum-advance mechanism to stop adding additional timing. So the timing the engine sees is the initial timing of say 10-12 degrees, plus the additional timing coming from the centrifugal advance mechanism, which increases with rpm. At 2,000 that would be 12+10 for 22, at 3,000 it would be 12+18 for 30, etc. How do I get BB to tune it how I want?