275's still won't fit on a factory 73 Dart with the factory 4.5 backspace.
I had to move my springs in 1/2 inch and trim the fender lips just to fit 9.5 inch rims and 245's.
Then the the tub is the limitation after that.
New wheels with a perfect offset for centering the tire in the well and they just barely touch the tub on a corner while going through a dip.
