OK....I've seen many threads started about body lifts, body mount locations, the number of body mount bolts, how to remove them, etc., so I thought I'd start a detailed thread after I located all of mine.
This thread was inspired by a post in an earlier thread about stuck and rusted body mount bolts where a poster (sorry, can't remember who) suggested to drill a small hole near each bolt in order to spray it liberally with PB Blaster.
All of the pix are from the pass side of mi rig, which is an '89. It should be the same for most. I will try to describe the locations as accurately as I can, but feel free to reply if I didn't make it clear enough.
There are a total of 11 bolts and I'll start at the front and work my way to the back.
The first one is located under the front bumper and dead center below the radiator. Pretty simple.
The second one is located very near the rear leaf spring mount of the front spring, and can be sprayed without drilling the floor of the tub. Just get under there and you'll see what I mean. Repeat for driver side.
The third one is a bit more tricky. You need to drill a small hole (1/4" or 3/8" is fine) right in front of the seat bracket that is closest to the rocker (not the bracket nearest the trans hump). This will allow you to spray the PB right onto the offending bolt/nut plate. If you get it right, you'll see PB dripping from underneath. Repeat for driver side.
The fourth one is located behind the front seat, near the rollbar and front seatbelt mounts, directly under a little bump in the floor (about the size of half a golf ball). When you drill this hole, you will hit the top of the bolt end which is about a 1/4" below the bump. Repeat for driver side.
The fifth one is located inside the tub, under the rear seat. Fold the seat out of the way and follow the raised support ridge nearest the wheel well, about 18"-20" in from the back door jamb (kinda near the rear seat belt mount) and you'll see a little extension off the ridge. The bolt is located directly under that extension. With this one, I found that the bolt end was right smack against the metal of the tub, so I drilled the hole a little off center and it worked fine. Repeat for driver side.
Last but not least is the one located at the very rear corner of the tub. For this one, you need to pull the plastic mud guard out of the way (as if you were getting to the wiring for the tank sending unit), and drill the hole in the face of the box that is there for tub support (I believe), and spray in at the side of the bolt as opposed to from the top. See the little silver speck by the arrow? That's the hole. Not the greatest pic.
That's about it. It's a pretty simple job that took me less than an hour. All the sheet metal is not real heavy gauge and drills with ease. I'm gonna spray my bolts a couple of times a day for a week before I even attempt to remove them.
I hope this thread help. I've gotten tons of great info on this board and just wanted to give a little back.