1973 Disc Brake conversion / SBP / 14" narrow steel wheels

Mike I thought that was the 13" rims that was the deal breaker? Might to show pics of what you have
I've already used a Ram Man conversion on my 1972 Duster...small bolt pattern Rallye wheels. I tried the stock 1973 Scamp "narrow" wheels, and they did NOT come close to fitting over the caliper.