Years ago I tried a bunch of different size carbs. on a 440 bracket motor(452 C.I.) in a Duster that weighed right at 3200 lbs with me in it, I wanted to run Super Street with that car that year with a 727 and a trans brake. I started off with a Holley 650 CFM DP and ended up at the end of the year with Holley 1050 CFM Dominator to make it run the index at LACR, that car ran 11.70 ET with the 650 and got faster and quicker every time I put a bigger carb on it I treid a Holley 750 D.P., 850 D.p., 950 HP and finally the 1050 Dominator Most of them stupid Mopar V8 don't know the rules like the other motors follow