You won't need much to fit 33s. I've got 33x12.50s on stock wheels, and I FINALLY cranked the torsion bars after putting an ARB on the front. I added Old Man Emu coil springs in the back to compensate for the heavy loads I carry. Sits nicely now with zero rubbing in offroad environments. If I were you, I'd bypass the 12.50 width tires and fit a set of 33x10.50 BFGs (AT or MT, either are a good choice). Be sure to get a full size spare since you have a center differential. If you ever blow a tire in 4wd CDL, you'll need to have the same height tires.
Looks good. i dig the red-ish color. A blacked out hood would look nice, be sure to sand off as much of the clear coat as possible, prime then paint. Or, sand off the pealing clear coat (but leave paint in tact) and use black vinyl. I may go that route at some point, but its not a priority.