You should select a pair of carbs. that flow the exact same amount of CFM through both ends of the carbs. Holley 750 DP do, so do 850 D.P. and most Holley 1050 Dominators. The Holley 650 D.P. have different venturi boosters in the rear than in the front, I'm not sure about the 600 D.P. confused
If I was you and know what I know I wouldn't hesitate a second to buy the Holley 750 D.P. tunnel ram carbs thumbs twocents IHTHs

Last edited by Cab_Burge; 02/16/16 04:18 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)