Any reason not to do this?

STOP ! ! ! Give your head a shake,, find a close friend to give you a slap up the side of your head...

You're gonna give the bone-head that couldn't torque your pinion correctly, that had no clue about the diff spline mis-align, so he wacked an axle, and now it's no use to you,, NOW, your gonna give this guy a chance to cut up one of the most expensive 8 3/4 housings out there...

Get the diff splines aligned,, send it to some-one if you don't think you can do it yourself, by the several descriptions offered here...

Get another axle, the right length from here or Dr. Diff..

AND NEVER GO BACK TO THAT IDIOT AGAIN,,, RUNNNNN, ... run far

where the heck is League City anyway,, anybody live near him, or close enuff to go align that diff..

this is where I wish I had a magic wand... sheesh ...
The last thing I want is to frustrate anyone here. I just thought why not narrow the rear for free instead of buying a new axle and bearing. I will buy a new axle to keep things cool here. That's why I posed this question is too get opinions. League City is between Galveston and Houston. 20 minutes either direction.