You can’t restore a truck properly without the right tires. Look at anything cast in rubber today and it’ll be a radial, maybe with flotation properties or shaped to fit wheels with offsets that didn’t exist in the pre-Interstate days.
One source that can help you get things correct is M.E. Miller Tire, of Wauseon, Ohio. Miller’s specialty is re-creating antiquity in commercial rubber. Two of their stocked offerings are depicted here, a narrow Tornel Traction for highway use and a narrower Denman Highway Rib, dedicated to older stuff. Miller sells rubber for everything from pulling applications to antique farm equipment. Call 800-621-1955 or check out www.millertire.com.