Wheel backspace question

[blown motor]

What was the backspace on an original 14" Challenger wheel in 74? You get extra points if you know what it was on a Montego in 72. I have a guy who wants to buy my rims and we're trying to determine if they will fit properly.

[HP2]

At only 5.5" width, not sure it really matters. They are so skinny they will fit practically anywhere and by '74, they had the ability to fit disk brakes without interference as well.