If I were the OP, I would give Dwayne Porter a call with all your combination, and have him spec out the correct cam for you. I would bet good money doing that one thing would show solid gains across the map.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight 418 BPE factory replacement headed stroker, 565 lift solid cam Best so far, low 10.30’s 1/4 1.41 best 60 foot 6.56 at 104.17