Thanks for the 8 3/4 rear end but ...

Now I find a bolt broken off inside the driver's side pinion snubber bracket (photo
Drill it out and run a tap to clean up the threads

And the hollow differential vent bolt won't thread into the differential either (photo three
The broken off old vent is still in the hole, drill it out, run a tap in to clean up the threads.
P.S. And the large, round rear part of the differential (derrière) has a big dent in it. I am surprised the gears have room enough inside there to spin around
Hammer and dolly, then some filler to make it smooth.