Narrowed 8 3/4 questions

In post 16
It appears to me, that
you are looking at the captured Thrust-block
This block is NOT found on a clutch-type Limited Slip.
It is found in all cone-type Mopar 8.75 Sure Grips. It is captive on the Crosspin and cannot be lost.
But you can take it out and machine the ends off for additional room to push the axles in. However, there is a limit, cuz if you offset it too far in one direction, it will impinge on the Crosspin, making it absorb the thrust in the corners...... instead of the thrust going to the tapered bearings. IDK how long the crosspin would survive.

The thing is that to remove the thrust block, the pumpkin has to be removed and the Crosspin removed. And to figure out how much needs to be taken off, the axles have to be reinstalled, centered, and the space between them measured, to find a dimension for the new T-block......
At that point, if the T-block is too wide, you may as well just take the excess off the axles.
But if the T-block is too narrow, then your axles are too short. As mine where. I opted to just weld spacers onto the ends of my axles. It ain't rocket science. That way all of my many chunks were still interchangeable.
The only thing to worry about is that the cones and side gears still sufficiently engage the splines. In my case there was plenty of room.