I had same problem. Paid a fool $200 to narrow a 14 bolt to fit under my 63chevy . when the muppet was done the rear end stuck out 3.5 inches on the driver side. Gathered up a complete second set of parts and went to a pro. $700 dollars later I had what i was expecting included in that 700 was a pair of super dooper steel axles.

My origional eaton was a 456 this one was a 373,

your 1 ton rear is the way to go. indestructable and cheap.