Thanks very much for your input, I have a feeling that I must have put the camshaft in a box that was for a chevy because when I look up 320HLM on the Sig Erson site that 320HLM is for a chevy motor. After 40 years I kind of forget a lot of the things I knew back then. But I was sure the cam I have had a 302 duration, but I do not know how to check it out as I live in a small town and there is no mopar engine builders here.What cam would you recommend for 2 750 Holley's? I do not have the original carbs that is why Iwant to know if there is a better carb setup today than there was 40 years ago, thanks for your input.