383 cam advice?

Good and useful information, thanks!

Don't you sacrifice some of the low end power and response and with a RPM intake?
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.