Im gonna run a DSS XR 331 shortblock with a T76 that im gonna rev til it stops making power. I dont really see why 180 should be a problem cuz right now on a 3.55 gear and a world class T5 I can pull 160 all day. But I do understand that im trying to do the speed range on 4 speeds as compared to 5 speeds. Would I be better off using like a TKO600 or a T56 instead of an auto??