408 Cam on the way

Idaho said
Sounds weird I know but these are for the countershaft which does not rotate in the bushing. It prevents tranny failure from the holes in the aluminum case enlarging.

The Ultimate Mopar A-833 4-Speed Fix: Get Overdrive & Strength! - Hot Rod

I think when I rebuilt my 4-speed I put in new bearings, seals, synchros, and steel shift forks and new shifter throws and new shifter ears just to tighten everything up...