Rebuilt a carb cleaned it all and used air gun to clean out used standard venturi 1mm a/c 1.2 main 1.2mm 2nd stage and used new gaskets set boost to 18psi using stage 3 hybrid with 285 piper cam set afr 14.1 to 14.3 it pulled like hell on boost at 11.8 but on cruise the reading was between 10 and high 11,s. i chaned the a/c to a 1.25 and still the same. on way home i broke down tried starting it and there was no fuel delivery so i put old carb back on and same again . After a load of checks by chance i took the lid of fuel tank and the fuel sender or what ever its called was in peices in the tank i replaced it with a spare went to start car it took a while but it fired up ticked over fine could the fuel sender have caused this and the car to run lean while cars on cruise. gonna take the car out for a test 2mora and curious about the new built car.