I know this thread is a bit old, but I was searching for info on Bushwackers and came across this one, and since I recently put a set of 36" IROKs on my rig, I thought I'd toss out some info on my experience.
I'm currently running DPG's new TrailGunner 5" coils and leafs, with 3/4" spacers up front and JKS 1" shackles in the back. Tires are bias-ply 36x13.5R15 IROKs on 15x8" TrailReady beadlocks with 3.25" backspacing. I've also got Warn hubs that add about 3/4" per side...
With the trimming I did to install my Bushwackers the tires fit pretty well. For Bumpstops I'm running DPG's adjustable bumpstop plates and Daystar extended snubbers in the back, with RE 3" bumpstop pucks and Daystar extended snubbers in the front.
The tires fit fine in the back, and just barely rub the fender well (just cleans the dirt and paint off)
Front however... the swampers are a little too big to really fit up into the flares, at least not without cutting out the inner lip (anyone know anyone that's done that on the front flares??). At full compression the tires pushed on the back of the flares enough to pull the lower-most bolts through the flares, and the second to lowest bolts pulled through the sheet metal (bottom bolts have nuts on the back, which is why they pulled through the flares and not the fender).
More pics from this set here:
http://www.flickr.com/photos/jeepin/sets/72157600026236318/
Since the tires are a bit too big to really fit well with the front Bushwackers, I'm seeing how it would look flareless (to give you an idea of the trimming I've done).