Going to cut axle tubes

I just went through this and am having a narrowed Dana 60 built right now, so you know what side I'm going to take.

I just recently did a mini-tub and spring relocate on my 67 Dart. With a stock width rear end, I would have had to run a wheel with 7.5 inches of backspacing in order to fit a 10 inch wheel in there (think late model Mustang). I have to run no more than 3.5 inches of back spacing for the disc brakes I chose, and the only way to achieve this was to shorten the rear end by 4 inches each side. I sold my stock 8 3/4 to help finance the Dana.