Whos running over 700whp on an 8.75?

Did you buy the actual alignment inserts and rod? Or did you just put the shafts and bearings in the ends and use garage tools to get it close and weld it up? I was thinking I'll assemble it all and cut 4 windows in a piston ring compressor and use that to wrap around the housing and the new housing end to tack weld it.

I had a buddy weld the ends on since he had the appropriate end pucks and solid alignment bar. Since the tubing is so thick, I wouldn't have a problem doing it your way either. Just keep in mind the housing ends likely have a different OD than the axle tubes, so you'll have to account for that somehow.