Going BBP will widen your track front and rear if you use 73-up OEM front discs and off the shelf BBP rear axles and BBP drums of any width or diameter.
When you do the QA1 uppers (I have them) Be sure they clear the arm mounts, I have to grind a chamfer that hit the tube but would otherwise clear the factory arm.
@72bluNblu Has probably wrote about wheel fitment so many times he has a word document saved to copy paste from.
