Well, duh, I forgot my truck has Dayton wheels, so there is no flange to flange measurement. I guess I assumed that is what you were looking for.
I did measure the distance between the outer axle ends, with the drive flange and retaining studs. That dimension is close to 67 3/4", I would say within 1/4" using the method I used. My wheel/tire combination yields a depth from the tire sidewall to that axle drive flange of 6".
With 8.25x20 tires, outer sidewall to outer sidewall, the dimension is 89 3/4".
I don't know if this will help, hopefully it does.
