To answer the question....... as best I can.......
I havent used that Lunati cam, but it looks like a suitable choice for the direction you’re trying to go.
I also agree that for operating range you’re running the motor in, 200/500 springs loads should be plenty.

To put my .02 in on things that weren’t asked.......
for that operating range, I think the MW sized ports and manifold were a mistake....... but you have what you have.
Even at 500”, they’re likely tuned for a higher tq peak than 4800.
(I realize the choices for MPI BB Mopar intakes is pretty limited. Looks like there is a std port EFI Victor though.)

I also feel the 2.25” primary is too big for the operating range you’re targeting.
If you could have whatever you wanted, considering the size of the heads/intake...... I’d have gone with 1.875.