I honestly dont know what tires they put on a 1 ton to say if they'll fit.. but it'll use one size or the other fender.
The 1/2 ton and 3/4 tons generally have 16" tires on them stock (the 3/4 tons just have more lugs) and the front fenders are interchangable.
My guess would be if your tires are 16" or smaller, that the 1/2 ton and 3/4 ton fenders would fit. If they're larger than 16", you'll probably need fenders off a 1.5 or 2 ton.
