[WardL]

I have the same Roush 427 SRTW #460 with a BIGS Performance Stage Five 750 CFM double pumper. The primaries are 75 and secondaries are 82, primary power valve is 4.5, primary and secondary shooters are both 0.035, the idle feed is 0.033 and the bleeds are 0.073 Idle and 0.036 Main. Not exactly sure what all of this means but that's what is says on the card. There is no choke on this carb. It doesn't backfire when slowing down or hesitate when you step on the gas. I pretty sure this is unrelated but when I go hard around a corner it sort of flutters. Other than that it runs great. I can get 16 MPG on the freeway at 65-70 with 0.82 OD. I've averaged 13.5 MPG since purchased. I did change the distributor springs last summer to pull in full advance sooner in the mechanical advance. I think the weaker springs helped the gas mileage.