ok so i swapped an 89 350/700r4 and i think a 208 case into a 98 yukon. now i need to find a rear drive shaft for it. the 89 the combo came out of had an aluminum drive shaft while the yukon has a steel one. u joints are different, yolks are different, at least for the t-case havent checked the rear end yet. so my question is how do i make it work?