Vetters, I am having a bad time with the Edlebrock Q JET I purchased last week and am thinking of returning it and buying a Holley. Need some recommendations for a Holley CARB to put on my 71. Anyone familular with the Holley 4150 or 4175. I believe the 4175 is a replacement for the orginal Rodchester. I belive I am limted to a 650 CFM.