Wrong cam/converter combination on the 340

I'd call and talk to Sean at Frank Lupo's Dynamic converters at 302-454-9203. He will be asking you a LOT of questions about your car, engine, trans, rear end, intended use, etc. They can also do you a cam based upon the info you give him. I've seen many FABO'ers recommend them. Over at the 62-65 Mopar forum they come highly recommended. Hope this helps.