back in the day when i was beating on a 383 4spd road chicken i used an old crower 201hj, 284/ .480 lift, 228@.050, 110 lsa. i tried different cams and all i did was screw the torque up. very good 383 street cam. i'm pretty sure that crower grind is long gone but a simple comp cams 280mag would be a perfect substitute. i'd also think about a comp 268xs or 282/.495 if you can get yourself to try a small solid.