I did one a couple years ago but didn't take pictures I have forgotten what all I ran into but I remember the plug you mentioned.

When you get to the OD end, use a rubberband like comes on broccoli to hold the rollers in place. You can leave it in the tranny.

"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.