I'm building a 292 .30 over with a cliff cam 264 high torque, I'm thinking I want a 4 bbl carb any thoughts on type and CFM, the cfm calculator I found goes 488 street and 690 full race. I don't want to be over carbed for drivability, but I want power, just a good balance the best of everything, is that to much to ask for. The 292 is going in my 47 3/4 bolt, P/U.