I didn't know this,from Moser,axle flange to mounting flange, are made from 2.311",2.423" and 2.673". In other words, "they" want to know who's disc brake kit your using. I hoping to use a 55" wide housing, "maybe" with shortest axles, and 5 3/4"-6 3/4", backspaced wheels, in a 67' cuda,(mini...