[radar1]

I also recently dropped my 85 GMC. Sounds like nearly the same set up. I did the 3 inch bell tech spindles, and cut one coil on my stock springs. I ended up with a 5 inch drop in front. I also did the flip kit out back. At first I thought that I needed to cut my bump stops on the front. When I did the truck bottomed out badly, actually could hear grinding of the lower a-arm on the pavement. I then replaced the bump stops and cut only about 3/8 of a inch of the second set of bump stops. That helped out a lot. But on occasion I would still rub on the inner fender. I guess I should also tell you that I am running 255/60-15 tires on the front, with 15x7 inch ralleys. The 15x7's have a smaller back spacing than the 15x8's, requiring less grinding of the lower A-arms. I then decided to replace the cut bump stops with new stops, not cutting any at all. That seemed to take care of 90 percent of the rubbing in the inner fender area. All seemed to be great, until I was coming home from a local show. I went over a set of train tracks and caught the leading edge of the A-arms on the concrete in between the tracks, at about 10 mph. The truck stopped right now, killed the motor, and my buddy's glasses ended up under my feet. I limped the truck to the side of the side of the road, and had my wife come to rescue us. Picked truck up next day on rollback. I have since replaced the lower control arms and springs, this time I only cut a 1/2 coil. It raised the truck up near 1 inch. However the crossmember must have been twisted in the accident. The A-arm on the passenger side is touching the header. I am now awaiting the verdict from the body shop, on what it will take on the frame machine to straiten it out.
Pictures are from before I left for the show, and the train tracks that got me. All I can say is be careful with that much drop. It has really sucked this week. I have a build thread going with what I've done to the truck, look for Radar's 85 gmc.