68-72 rotors on 73+ spindles?

So it turns out I dun goofed when I bought the disc brake setup off a '74 dart sport. I wasn't aware that they changed the bolt pattern from small to big in 1973, and so here I am with a set of brakes that won't fit my current wheels. I tried looking at some alternate solutions, and for some dumb reason, this idea just now popped into my head. If I just buy some factor small bolt pattern rotors ('68-72), will they fit on the 1974 spindles? Because at that point I can just buy rotors and bearings and then be good to go.
Uh no.

However, give Cass at Drdiff.com a call. I have seen dual pattern rotors that fit the 73 and newer spindles