The ‘46 Chevy 1/2 tons typically used 6.00 X 16 tires, 16” rims, and were 6 lug. 15 inch artillery wheels were an option, but also were 6 lug. I don’t recall off hand when Chevrolet started using 5 lug wheels. As for the hubcaps, maybe one of the classic tire vendors, such as Coker, Universal or similar will have caps that will fit?
