Fenders on a 1 ton are the same as a 1/2 ton and a 3/4 ton.
1.5 and 2 ton fenders are larger, and the same.
17" tires are standard for an AD 1 ton single wheel truck.
18" wheels are normal for an AD dual wheel truck.
I have had 19.5" wheels and 8x19.5 tires on the front of my 1 ton, with the correct small front fenders. They just fit, and looked great in my opinion. They also rode much smoother than the 7.50x17 tires I had before.
Grigg