I'm gonna assume you have the DRW 17.5s. Those are a Budd Company product and in 1959 were part number 71320. You'll find that number on the back/concave side of them. Below is a picture. Below too is a thread with guy's looking for these wheels. Also in that thread, member GBSisson shows how he changed his F-350 to the 3/4 ton 8 x 6.5" pattern. Might work for you too. Stu

https://www.ford-trucks.com/forums/8...on-rims-4.html