My cam in my 383 engine right now is the old Mopar purple cam? 284/484. Maybe it will help somewhat. I always thought the cam though not ground breaking was a good solid hp and torque producer.
I really like the old MP grinds a lot. People can trash them all they want but they flat out work. Yes, that cam has enough duration @ .050 that the Rhoads lifters would probably be of benefit to help pump bottom end torque up. You'll lose some idle characteristics, though and don't forget, those lifters do produce a ticking noise under normal circumstances.
