The bsp3 is whats in my motor, and i have had pretty good luck with it and make great power. With any cam you choose to use, you need to match up the carb, pipe, and timing to what that cam likes if you want to make the best power with it. Your best bet is to do what dover said he does, and try different pulls with each cam in your engine, and see which one makes the most power for that engine with those particular mods.