Okay, it is possible to get a wrench back behind the dash to hold the nut and undscrew. You're going to HAVE to do this when you reinstall them. But I'll give you some tips. I used some cheap ass drill bits, and they worked for one side. Then I broke them so I got some more cheap ass drill bits. Don't worry, the first set was about 10 years old and had been through hell. I don't know what size bit I used, but I know the bolt is a 5/16. If you go too small, you'll have to re-drill cause it won't weaken it enough. It really doesn't matter how big you go cause you're gonna have to replace the bolt and nut anyway. Now drill in quite a ways. All the way isn't neccasary. Take a punch and put it in the hole you drill and hit it a few times with a hammer. You should have drilled away enough to weaken the bolt and it'll break and fall right through. Also, make sure the drill is not in reverse. This may or may not be from my experience
Okay, so I drilled for 5 minutes(acutally making progress) with the drill in reverse. Partially the reason I snapped a bit. After you've knocked all of them through, have a beer(or other drink) and be proud that you got the easy part done! Now, here's the pain in the ass part, installation. I used new hex bolts for my hinges. I only had a few problems. First, don't use 5/16 washers with them, they don't completly fit around the presunk hole for the torx bolts. Second, I noticed that I had to shave one of the bolts on the side cause my door hinge got caught on it. If you're using torx bolts, stop reading this, and slam your head against the screen til you realize that torx = sh!t! Okay, now a tricky part I found was putting the nuts on the back side. Get a nut with a lip on it so it won't fall through your wrench, or super glue a washer onto the nut(what I did). If you don't, your wrench will keep falling off the nut(hard to explain). I also used lock nuts and that made it harder to thread. The passenger side is a piece of cake. There's plenty of room to put your hand up with a wrench and put the nuts on. Make sure you adjust your hinges for the doors. Now, this is the VERY sucky part. It IS possible to do, but very hard/painful. For the drivers side, you have to squeeze and monkey around and do everything to get your and up in there. Some people said they removed the e-brake assembly, but I didn't find that neccasariy. It helps to tape the nut to the socket so it won't fall off. This took me about an hour to install the drivers side. The hardest part is the damn speakers kept catching my wrench with the magnet. Also, since you have CJ this may be easier or may be hard to do. I did this on a YJ. I do know that it'll be rustier. But since you're drilling them out, it really doesn't play a roll. Hope I've helped and hope this isn't TOO long. If you have any questions, respond to this or e-mail you. I'd be glad to help you out some more!
"James and the Giant Jeep"
1993 Wrangler 4.0/5spd, Herculined Interior