Some of you may remember my story from last summer: I was getting hassled by the local boys-in-blue because my truck needed to be registered commercially if I ran it as a dually.
https://www.fordbarn.com/forum/showt...86#post1644486
Long story short I opted to go with a set of custom super singles, running 305/55R20 Mud Tires. I stuck with Firestone's to pay respect to the available tires of yesteryear. The 10 ply's actually give me equal carrying capacity as the original 6.00-20's
The rims are fabricated from pre-made 20x10 wheel hoops and custom centers I designed and had cut by a local CNC shop. Powder coated for maximum durability, they should last as long as the truck.