8 3/4 axels???

52 5/8 is correct.

If you are mini tubbing, I would go shorter. You'll need wheels with lots of offset at stock a body length.

23" is too short for axles. 25" axles will make the total rear width about 51.50-51.75 IIRC.

Just get axles from Dr Diff and be done with it. The total rear width with BBP axle standoffs will be right at 57 5/8"

IMHO, snubber = doorstop.