Really in a Jeep a high rise is the wrong thing to do, but I agree with keepng the 350, 383's have a lot of problems if they aren't professionally built with very careful parts selection.

On the intake stick with something like a Performer. on the cam select one with about 112 LSA, around 270-276* of duration and abot 470-480" lift.

This will really wake a stock low compression 350 up without making it unmanageable. You don't want a highrise or large cam b/c you will lose the low rpm Tq that you need for climbing hills slowly.