Well, I am starting on the upgrade this weekend. I am replacing the front and rear 30 spline 3.73 10 bolts with an open Dana 60 front and a 14 bolt FF rear with factory locker from a 1981 K30 with 4.56s. I wanted to know if anyone has done this recently and what kind of roadblocks I may run into. I know I will need the trick 1310 to 1350 u-joints and new u-bolts with locking nuts. What else am I going to need? Brake lines? Steering components? If anyone is interested in the 10 bolts let me know, I may consider selling them and the 31x10.50x15 tires, 15x8 rally wheels and some 15x7 factory aluminum wheels. I will eventually replace my 700R4 and NP241 with the SM465 and NP205 combination from the K30, (that is if I make it through this one).