340 cam advice

I needed some advice on a build up I am putting together. It will go into a 71 Demon backed by a 904. Rear gears are to be determined. I want a mean sounding, hard running street car that will see the 1/4 mile from time to time.

Shortblock: 340 - bored, decked

Rotating assembly: Fullybalanced, SRP flat top 2 valve reliefs (72) 9.2 R, (60)10.5 CR

Heads: 340X lightly ported fully redone with new valves (5 angle) CC springs and needed hardware.

I am considering the Purple 484 cam or even the CC Xtreme energy 284.

Interested to hear experiences with similar builds. Thanks!