Upgrading to 15' wheel vintiques series 63

if you have small bolt pattern might try some new axels @ the rear and a disc setup from a 73 and up. This would upgrade you to big bolt pattern
I’m happy with the wheel options I’ve found, just need to figure out what size and back spacing will work.

I think a 15x8 with 4.5” back spacing will fit? And 15x7 up front with 4” back spacing?