383 cam advice?

Not IMO! I have it on a ‘00-5.9 that is otherwise stock except the following. A 600 Edelbrock and 1-3/4 headers into a 2-1/2 true dual exhaust. Chrome box ignition.

3.55’s on 26-1/2 tires stock 727 trans and stock low stall converter in a ‘79 B body. Works excellent.

I went from RPM to the lower Performer, shaved off the J heads and put on a smaller 600 carb on a 360 that came in a Cuda I bought and it really woke her up. It had an unknown cam but it was kinda hot for a street car. I shaved off a little too much so it got 180-195 psi cyl pressure. I had a hard time tuning carb and timing to make it run good without pinging on pump gas.
Afterwards it always impossible to know what made what but that engine got a very broad powerband.