With the catastrophic failure mode these have on the 3rd gen (fixed in the 4th gen) - and having seen a number of failures from aftermarket LBJ's, I really wouldn't do anything other than OEM. And pay very close attention to the torque specs on both the large nut as well as the 4 smaller bolts. Too tight is every bit as bad as too loose. I've seen some failures where it's possible they were simply overtightened on installation - where the bolts break, or the nut breaks off with part of the shaft. However, where the ball separates from the socket - that's all on the part failing.