325/65r18 mickey thompson mtz
 

would 325/65's be too wide of a tire to fit on the stock 18 inch rims. And if it worked wat issues would i run into

As long as it's under 12.5"s wide you'll be fine.

Those are close to 13 inches wide, too wide for the stock wheels. Some guy's have done it but you would have some rubbing and premature tire wear. I'd stick with a 305x65x18 BFG AT. Close to 34 inches tall and would work on a leveled 4x4 on the stock wheels.

i get the tires tomorrow i only plan on keeping the stock rims for maybe a month then i am going to 18x9 ultra wheel mammoths