Cragar center caps (SBP)

Exactly! I appreciate you digging a little and you can see it’s a strange problem. I feel as though Cragar wouldn’t have made three different sized caps bc that’s logistics cost prohibitive but who knows. I’m constantly surprised by how auto manufacturers will switch parts out mid year or use stuff up from warehouses depending on where a car was built.

Assuming there are only two cap sizes, it seems the 13” wheel caps would work logically because the small bolt pattern wheels seems very specific to these cars. Prob wishful thinking, hopefully someone here will know the answer!