I did the proper way and put them both in from the top, mainly so if a nut should come off I wouldn't lose the bolt out the bottom and cause major havoc. It took me about 20 minutes per side and that was doing it myself. Its not hard at all to do it that way. I think from looking back at it that you could possibly even skip the upper ball joint and get it in by unhooking the tie rod and just sharply turning the hub to move the shift out of the way. Even with separating the UBJ it only took about 45 minutes start to finish for it all, including putting the tools away.