yeah, but its gonna rub whenever it flexes while turning
.How wide are the rims, what is the backspacing, and how soft/saggy are the springs?
Stock backspacing on the 15x8 Rally's is 4".
Is it the front that rubs? You could use zero rates to space the axle forward and keep the tires out of the rear of the fenders. That's the common rubbing area.

If I get the Zero Rates what U Bolts do I need for the added 1"?

immm longer ones....
adding zero rates doesnt change the ubolts other than making sure you can add that 1" and have the ubolts still work
Ive run stock on 35's and they only rubbed when the tire hit the top of my wheel well.
Cut the corners off of the inside of your fender.