How do you change the lower ball joints on a 90 Chevy Lumina?

Changing balljoint on this car is a pain in the butt! You mite what to take it to shop. But if you what to try this. First you disconnect the balljoint from the hub. -18mm nut (I beleive) This is the hardest part- removing the rivits that hold the joints to the control arms. The eaisest way that I found is to drill the rivits halfway thought, them knouck off the rivet heads with a chisel- I use a air Hammer with a chisel tip. Then drive out the rest of the rivit with a straight dit in the air hammer. Once all the rivits- (WoW that yes work) you can remove the old balljoint. Almost all after market (I have found) the mounting bolts always are bigger then the holes in the control arms, Just rim out the holes with a file or die grinder. Know just reassemble in reverse order. Good Luck!! Cordobaman GOD BLESS OUR TROOPS