You could go small block and get where you want easily at that weight. A good 4 inch indy headed small block should run 5’s easily. Even a W5 deal would. Plus you would be shedding more weight
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