Bigger motor pulls harder on the boosters requiring less fuel..........Boils down to give it what it wants BUT, et's and plug reading are the REAL deal and the afr's are what they are accordingly........ beer

72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....