what is the offset of factory wheel 73 new yorker

[sidsnot]

hi what is the off set ,et of 73 chrysler new yorker brougham ,need to know ,i am looking at a set of wheels 17 x8 et 45mm want to know if they fit ,stud pat ok 114.3,5 stud ok .any help thanks Dave wheel are off Ford Mustang GT SN95

 

[cbarge]

Offset is typically 0 degrees with backspacing off 3.75 to 4.25 inches.
I would be concerned about the offset of those newer Mustang wheels.
In theory they should fit.