Al ,ran with c12 vp and an 1150 cfm Holley,bolted on 1250 gen ootb,the car picked up a tenth and 3.5 mph ,my down fall was attempting to switch to e-85 with the 1250 i would have been better off converting the 1150 to e-85 than the 1250.just a few short months till we see marks results...pat