Looking for advice, BB headers vs. HP manifolds

My 451 wasnt a stock 383 out of a station wagon: Max effort CNC ported iron heads, Crane .590 lift cam, 1.6 rockers, 9.8:1 compression, single plane Strip Dominator intake, 850 carb. 3.91 rear...hey those 205 tires didn't stand a chance! :p One of those mismatched combos that landed in my lap when a buddies storage unit had 6 hours left until they padlocked it and I had to grab what I could out of it. Couldnt get the Hemi 4sp out in time....