I think with a 3.5" bs the tire would be too close to the outer fender even with it rolled, with that 10.5" wide tire and the 4.5" would be too close to the frame. The 10.5" slick you will need a 10" rim. You will have to go with Centerline rims probaly a 4.75-5" bs. Get a stock rim without the tire and do some measurements to be shure.