A 17.5" x 5.25" wide wheel was an option on 1965 F-100s. It has the standard 5 lug x 5.5" pattern and has 1/2" of offset. It is K-H #40337 / NWRA cross reference # X-45059. No point though in cross referencing to other vehicles since Ford is the only manufacturer that supplied it on their trucks. If you find a set they will use an 8-17.5" tire that can be purchased from Coker, Universal Tire, and no doubt others.
It should accept the standard 8.092" innie hub cap. Stu