I've heard of richening the mixture using boosted pressure on EFI systems but I'm not sure I've ever heard of doing this on a carbed system. I would think you'd just overwhelm the carb and would just be dumping in fuel, not metering it in any way.
I guess I'm kinda useless. I'm going for a custom manifold, EFI turbo setup with computer controlled ignition. I've heard of getting after market vacuum cans for HEI's that do retarding under boost as well as advance under vacuum. That might be worth looking into. Other than that I can't help a whole lot..........
