I got a set of rims and tires at a swap meet a couple of weeks ago. Lift is on the truck so when I went to put them on the rear is fine but the front are rubbing on the calipers. The rims are a deep dish 15x12 with a 35 inch tire. Do I need some type of spacer or is that dangerous. The truck is a 69 Blazer with a front rear(dana 44 6 lug) swapped out of a 72 blazer in order to get the disc brakes and install the cross over steering. Will I need to go to a 16 inch rim? Thanks for any help.