I got back to work on the Jeep this afternoon. I got the grinder back out and "carefully" finished grinding the head off the last bolt. I then put a long ratchet extension ( like a center punch) up to the rest of the bolt and used a floor jack and the weight of the Jeep to bust the welds off of the bracket that holds the body nut on. It worked great, and very fast. The rest of the body lift went smooth. The hole that I busted the nut out of, I just used a nut and a washer to make it work.
For the outer grill supports, I wasn't going to remove the grill to un-bolt the old ones and bolt up the new ones. Instead I grabbed them with a pair of channel locks and ripped the old ones off, and then lubed up the new ones, tapped them into place and when I lowered the body down they slid right on.
To cover the gap in the front, I used a stock TJ frame cover which sits about an inch higher. I had to tack weld a few nuts into some frame holes and drill a couple of small holes for screws. but I think it came out pretty good.
Tomorrow I'll be installing the MML