It is an Aeromotive A2000, # 10 to the regulator then #6 into a 2 into 1 to carb. It worked fine with my 408, the more I talk to people the more I am starting to think it may be converter. It just seems that with how much I fattened it up it should have run worse. I have 89 in front and 99 in back, the car should have been blubbering and burninn your eyes rich I would think but maybe not.