Adapter?

Hey All. Heres what I have. I've got a 71 Swinger with SBP front factory 4-disk brakes. The rear is a BBP 8 3/4 out of a 65 B-body. The rear is not cut down. I don't like the idea of running around with 2-spare tires. so I would have to use the adapter on the front and only till I get a flat fixed. So here is what I am looking at so far:

Option 1; Is there an adapter out there so I can use with the spare wheel for either front or rear?
Option 2; Or is there a wheel that will fit both SBP and BBP?
Option 3; Should I just try to get 73-up disk for the front?
So I guess I could just fix up a poll but not sure how to do that yet. So just let me know what you would do. Thanks.
Jeff