I have a fairly detailed writeup on that project, it can be a real PITA. I've done it but as part of a much larger restoration project so the knuckle busting didn't register too great in perspective. More than likely, you will have to cut at least half of the bolts because the sleeves that they go through will be weld rusted to the bolt. In that case a torch or carbide saw blade is in order, they are #8 bolts and those don't cut easily.
If you do do it, do one side at a time so the body doesn't shift. Also, while you are at it do the radiator frame mounts.
http://broncozone.com/topic/20667-1983-restoration/page__p__108668__hl__%22body+mounts%22__fromsearch__1#entry108668
http://broncograveyard.com/bronco/i-33102-radiator-core-support-upper-body-mount-sleeve.html
http://broncograveyard.com/bronco/i-33092-body-mount-bushings-bronco-red.html
Here is a cut and paste of my body mount experience:
I replaced mine as part of my restoration project over the last year+ . All I've got to say is that it was a ROYAL PITA. To replace the front ones you need to have them all loose so you can raise the body far enough to put the new mounts and associated hardware in. 5 of the 8 were so rusted inside the tube that I couldn't simply soak them as previously mentioned. I ended up using a carbide saw blade, (one with diamond grit along the edge), for a sawzall to cut the tubes and that took forever because you are cutting bolts that are a number 8 hardness.
If you are going to replace any, replace them all. Use the polly mounts. Make sure you get the kit for a Bronco and not a F150. The diagram in the LMC Truck shows the wrong poly mount for position 2. That is the poly mount for a F150. In fact the one that goes in that position, including the associated hardware, is the same as position 3. As far as bolts go, the bolt kit from Bronco grave yard is much too long so just go out and get the ones listed in Meisk5's first response. From the LMC Truck catalog you will need the following hardware
http://www.lmctruck....ll.aspx?Page=22 6 of #28, 6 of number 31, 2 of number 18, 6 of number 27, ( I didn't use the other numbers as they are the same part number, [/b ] what I did list skips the hardware they show for position #2 and gets you the correct part). LMC truck has been notified of the diagram error for position 2, which you can see in the second diagram of Miesk5's original post. The Bronco poly kit from Bronco Graveyard
http://broncograveya...co?search=33090 if you like RED then 33092 also has the correct poly bushings including the radiator support bushings. Do not waste your money on Jeff's hardware kit as it has bolts that are way too long (part number 33100). Get the hardware from LMC Truck that I previously listed, with the exception of the rear mounts, I went to LOWES and got # 8's from them. I don't know if LMC has the correct length bolts for the rear mounts, because by then I had so many useless bolts, I didn't want to risk getting another useless set
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If you do decide to do them, do one side at a time. You need to raise the body off the frame high enough to get the mount and the upper tube in. If you can afford it and want to save yourself a big headache, busted knuckles, years of doing penance for all the bad words you are going to use, have a body shop or some mechanic you don't like do it.
Note the information on which mounts to get. The kit has a wrong mount in it unless they have corrected it.
You may be better off letting someone else do it.
Hope this helps,
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