In my last reply I should have stated 'exhaust gas' analysis cause Denny already mentioned the 'incoming' variables and imperfections. Now if some 'top tuner' whiz would just tell us all how to build the sbc combo that would give a 100% utilization,,,100% of the time ,,,,then this carb question would be solved. Or hey,,,if shevy would perfect the street/strip combustion engine then we could get out of the hotrod dark ages. Well I've gotta go now my car is in the driveway warming up and I see smoke and water coming out of the tail pipe,,,geesh wonder why?