Sizing down ... need specifics for shopping

1972 Dodge Dart Swinger ... I did not do the swap, so I am unsure. I just know the wheels and tires that it has and that its the BBP.

Its really going to depend on how the conversion was done as this could effect your back spacing on the wheels. With that a Wheel Rite might get you going in the right direction to measure what you need.

https://www.amazon.com/dp/B002L1GFQE/?tag=fabo03-20