Well,, I've been following this thread and others in the past, and kept biting my tongue,, so here it goes..
Back in the day, I was doing 2 or 3 gear-sets a week, of all breeds.. we never had the eliminator spacer back then,,
What I did,, and I maintained these vehicles for decades after, so I know it didn't fail or cause a leaky seal ,,, was..
I had about 50, - 0.006 shims made that matched the front end of the crush sleeve and fit between the front bearing..
So instead of replacing the spacer, ( this was caused by an "back-order" of spacers from mopar , and necessity being the mother of invention). we just added a shim to the old spacer, and essentially collapsed it 6 thou more, @ 240 lb/ft...
Had to do it to a few fords too,, never a come back..
hope it helps
