I need help bad!!

The easy way to tell if the carbs to big how many inches of vacuum does your engine have at WOT more than 1.5 the carbs too small if less than your given up some drive ability and low end torque for more top end not biggest deal in a race car you don't want to see less than 1" of vacuum. All 2 barrels are rated at 3" and 4 barrels are rated at 1.5" so a six pack is less than a thousand cfms at 1.5" of vacuum.