widest tire with spring relocation

Just FYI, you can really use either offset kit. The Mopar performance 3/4" offset will not get you a full 3/4" of tire clearance. Moving the perches in 3/4" doesn't change the fact that there's only a 1/2" offset at the front hanger. The tightest clearance between the tire and the spring isn't at the perch, it's at the tire's section width. Since the front spring section is 20" long, the best you'll probably do is having the section width at the halfway point, which would mean you might gain an additional 1/8" of clearance. But the taller your tires are the smaller that advantage would be.

And, it's pretty much moot anyway. The 1/2" offset already makes the wheel tub the limiting factor. I only did a 1/2" offset on my Duster. Before I installed my rear sway bar I would get some rubbing on the inner wheel tub if I cross-axled the car going over a speed bump or drainage, but I've never had the tires rub on the springs. You need a lot more clearance to the wheel tub than to the spring because of the way the tire and suspension move.