I had a new 79 Aspen R/T E58 police 360 back in 79, 8.25 2.72 gear SureGrip.
My 8.25 axle was damaged when I slid into a curb. I bought a 73 340 4 speed Dart from a junkyard and swapped in the 8 3/4 rear end from the Dart into the Aspen.
Everything swapped over as an assembly, even the pins on...