A lot of people on here would say otherwise from what I've just read!
I do appreciate the fact that you recognize some of the major questions and ball-busting that comes with this topic.
I think you'll have no trouble fitting the tires. Might not have full flex and they may rub every so often, but at 4 inches you'll be fine. But it's not the fit that you need to worry about.
Do the tires come with rims and are the rims the proper lug pattern and with proper backspacing? If it's just the tires, do you have a rim that will support the tire (8-10 inches width)?
Then you have your axles. If you're rear is the stock Dana 35, then you're really asking for trouble at the most inopportune time. Having your ring and pinion gears explode on the highway is not a fun experience The shafts are strong enough with the 30 spline, but your gears aren't going to be able to support that extra stress. Mine exploded with 31s.
Then there's always the other concerns to address once you hit 35s. One is gearing which you've got yours set in the power range, so not bad. The second is brakes. They need to be upgraded. The third is your steering system. The weak steering links should be upgraded to at least ZJs or something HD. Finally, the last thing I can think of is inspecting and replacing all u-joints. The 35s can eat through axle shaft u-joints and should be replaced more frequently.
Other than that 35s GO NUTS!!!
__________________ It's got a Willy's body, a Chevy engine, Ford axles, GM transmission, and Dodge steering components... it must be a Wrangler.
I have 35 inch BFG's on aftermarket non lock wheels from AEV .. I also have a 6 inch lift .. I would want to get a bit more lift on it before going to a 35 .. JMHO .. .. I also have 4.88 dana 44's and air lockers .. some other things you might want to consider .. I am seriously considering going back down to 33's or thereabouts .. LOL ..