[T77911S]

take some measurements of the rim to the fender lip.
then put the 1.5 on the rear and take measurements.
you want the RIM just inside the lip. this should give you an idea of the spacer you need.
ideal would be get the tires you want then do the measuring because the tires will or may have some bulge on the sidewalls.

nice size wheels.
you should be able to run a 285 on the rear like mine. with a 235 up front.
you may want the 1 inch spacer on the front.

do the same measurements on the front except you need to also turn the wheel lock to lock.
then take the spacer off.

let me know if you want the 1inch.
you still want to go as wide as you can.