If you have a true 4+ inches you might be able to get away with no trimming at all. If you want to really flex your rig off road, I would still reccomend minor trimming. I'd say they would fit fine for ocasional off-roading.
Stuff that will affect this will be: year?? 84-96 usually can fit larger tires than a 97+ w/o trimming...
Wheel Backspacing? Determines how the tires will tuck under the fenders.
That looks gooooood Jason. Much better then last time I saw it. I run 265/75r16 Truxus (which is 31.8 ACTUAL size which is bigger then most 32"BFGs) on a 3.5 RE Superflex with full dakota rear leaves. had to cut a inch all the way around the flare. And as far as I could on the fender and 1/4 without moving the flares. I rub on the coil tower and rockrail at full flex.
Also have a hockey puck and a half added to the bump stop.