Well after a weekend of testing at the MEB Roundup I can say the swap was a success! It crawled everything I pointed it at including some trails I had trouble on last year on 36's. The 39.5's rolled over everything!
I didn't have time to put on any bumpstops because they will all require custom mounts and I didn't have any trouble despite only having essentially a 1-1/2" lift. With the dropped suspension I'm basically at the same overall height as I was when running 36's.
I did have to switch from a dual sump oilpan to a rear sump which worked out pretty well.
You can see in one of these pictures that the driveshaft, exhaust and traction bar are all pretty tight, but they all got along fine. I dumped the exhaust in front of the rear axle under the body as a temporary quick thing, but am pretty sure I will leave it there to keep it out of the rocks.
Because of where I cut the body to (not high enough) I did terrible on the RTI ramp, but never rubbed sheetmetal on the trail. So, I'm wondering if I need to bother cutting the sheetmetal any higher which would require serious inner fender modifications.
I think if I had it to do over again I would have kept the coil buckets and leaf spring brackets at their original height to keep it at a 3-1/2" lift instead of lowering it to help give me better uptravel.