Just did this project again a second time on the new Ex. Much, much, much smoother/faster the second time around. I
HIGHLY recommend buying, renting, or borrowing a powerful impact wrench to punish the factory mounts with (preferably compressed air; I used electric which worked great but steer clear of the cordless kind). For anyone considering doing this, I also highly advise keeping your sideskirts on until after the lift to see if you like the look, especially if you're going with the 3". Taking them off and then installing the lift leaves an ugly scar and exposes more of the post-lift undercarriage "gut". Not sure if that concerns anyone else, but I'll toss in a couple picture to show the difference...
1st Ex RIP
2nd Ex
Other information missing from this write-up I'd like to add...
-Factory carriage bolts are 18mm, new bolts are 19mm
-You don't need to unbolt the ground wire running up the center of the firewall or the ground wires found on either side of the frame around mid-cab, there should be more than enough slack for all three
-When referring to different body mounts I use the following classification...
o 1 is located in the engine bay. You’ll need to hold these mounts in place from above to loosen them from below
o Remove interior plastic moldings. Carpet will need to be pushed out of the way for access to the remaining body mounts.
o 2 is located below the carpet where the front passenger’s/driver’s feet would rest.
o 3 is located below the front passenger/driver bucket seats
o 4 is located behind the bench seat after folding the bench over and lifting up the hinged flaps
o 5 is located towards the back of the cargo area closer to the middle of the vehicle from the corners
The 792 kit comes with 6 180mm bolts, 2 200mm bolts, and 2 220mm bolts. With that said, Passenger/Driver "3" needs a much smaller length bolt than the rest of the bunch. You can use the bolts that come with the kit (180mm's) for only the front mounts ("1") and for "5". Other than that every bolt is entirely too long and you'll need to buy your own. The thread pattern is an M12-1.75, and I recommend picking up a couple 100mm's, a couple 120mm's, and a couple 140mm's. Unless I'm mistaken "4" can use the 140's, "2" uses the 120's (or you can re-use the factory carriage bolts from "5"), and you'll want the 100's for "3". Bear in mind that I'm only recommending 100mm's for 3 because I have a 120mm in it right now and it's still just barely too long by a few hairs; if the 100 is too short I'd still rather not use every thread in the mount and actually have pressure on the body than have a bolt that's too long and not really doing anything because it bottomed out.
And finally, some dissertations...
Location of body mount bolt under seat. Shown with seat removed.
IMO You don't need to remove the seats to access this mount. You can still access it after removing the interior moldings, moving the seat forward as far as possible, and pushing the carpet/insulation out of the way. Although, in the OP's defense removing the seat would make this process a lot easier if you would like to take the time to remove and later re-install both front seats.
This is the front body mount, shown with the 2" spacer installed. Please note that this mount has to be drilled out with a 1/2" drill bit as it has a thread inside it and the new bolt won't go through.
I didn't have this issue but I suspect it's because I removed the funnel-shaped threads (that description will make a lot more sense once you are staring at this mess) and replaced it with a large washer to make up for the couple of mm's lost by removing.
The rust OP mentions in "1" will definitely ruin your day if not handled wisely. Both installs I've worked on have required excessive force to remove these mounts, and 4 out of 4 times the bolts were corroded beyond recognition around the middle of the threads. Oh yeah and I live in Southern California so I'm doubtful anyone else's situation outside of socal will be much brighter.
Good luck to you if you plan on doing this. Feel free to send me any questions you have while this event is still fresh in my memory.
: high the 4b is) & muddies hit the top of the wheel arch when doing any big jumps.I was just wondering what would be involved with that. 
