I have 325/50 tires, at 28" tall, you don't need to move the rear back. For 30" tires, you need to move the rear back, but you can't keep the stock fuel tank. I never cut the wheelwells.
Okay, thx. Jeg's is lying then. They say your rear tires are 30" dia. When I seen that, I thought no way you fit that inside the stock wheel well. I plan on running a 29X10 slick under mine and I'll need to trim mine out some. Thx.