GM to Mopar trans swap?!

You got it.
I learned to call that part a mainshaft, in the tranny shop I once spent years in.
You learned to call the same part a tailshaft.
Same part.
Now, How in the world did you do that?! And with a teener no less. I needs me summathose traction bars.
Usually the rear end lets go first .

Rear end was actually swapped out with a beefier wider rear end out of a police cruiser many years ago, which is why that hasn't give out yet. My first idea was to find a 5 speed out of a 90s 318 Dakota but I can't afford a $1000 transmission right now. Guess I start saving my pennies

And how I did it? I spun the tires one to many times in a row lol