Keystone classics

[jac]

I have a set of 14 inch Keystone Classics rims that I would like to put on my 65 mustang. My search has led me to believe that I need a backspace of 3.75 inches, but the keystones only have a backspace of 3.5 inches. I was wondering if anyone has used keystone classics and would they work with that 3.5 inch backspace. Any thoughts would be appreciated

 

[2Blue2]

how wide is the rim?

 

[jac]

The keystones are 7" wide. I just did a front disc brake conversion.