I'm starting to look into drive shafts for my custom project (5.9L magnum swap, 241 TC, and Ford 8.8). I'm guessing I should at least go with a 1330 u-joint in whatever driveshaft option I go with over the 1310. How much stronger are the 1350's over the 1330's? Is it worth the added price bump it's going to cost? I'm planning on ordering a conversion flange from somewhere for the differential side of the driveshaft and probably going to be buying from somewhere like Adam's Driveshafts or Tom Wood's (unless someone can point me towards a cheap but equal quality option). I'm currently running 33" tires but once these ones are gone I'll be going to 35's. I think I've kind of answered my own question here and plan to go with the 1350, but just wanting to make sure I have my facts straight.