Is your truck lifted? STA makes a nice ~33" tire if your slots are roughly 9.5-9.75" wide (some were). If the more common ~8.25-8.5" wide slots, then 31" was about the tallest option I've ever seen.
I gotta say (again, my opinion only), not much looks better to me than stock lift with ~31" tire. It just seems right to me. I understand some folks like em lifted though, everyone has a favorite stance and look for their own truck
https://www.stausaonline.com/tires/sta-super-traxion/
EDIT: there's also these, but they're $$$ and don't exactly look even remotely period correct.
https://ntwonline.com/35x12-50r16-5e...RoCxxUQAvD_BwE