i want to get some new u joints and i dont know how to get one. i am afraid that if i go to checker or any part store, they will need make/model ect., and my tranny is a TH-400 out of only *** knows what, and the same for my driveshaft. Also, right now i make around 325 flyhweel power but that will soon go up to about 425, so should i get some sort of heavy duty u-joint?