I just finished lowering the front of my '93 and this is how I did it. I raised the brackets on the frame 1/2 inch by relocating the top hole in the bracket and the bottom hole in the frame.I drilled a small pilot hole about 1/2 inch down from the top hole in the bracket, after removing it of course,and then opened it up with a 5/16 bit and remounted the bracket and did the same to the other side. I then remounted the tires and checked the new height.It looks great.Then I took the tires off and drilled a pilot hole in the center of the bottom hole in the bracket thru the frame,and opened this up with a 7/32 drill.The screws on my car are the self tapping type so I started them by using a 1/2 inch impact wrench and a little engine oil on the threads.Tighten them down ,put the tires back on and make any final adjustments at the ride height sensors and you're done. Just use a small jack or you may not be able to remove it when you finish.And do a four wheel alingment A.S.A.P,because this mod throws the aligment off BIG TIME.