'65 Dart /6 A833 swap - clutch fork, input shaft, speedo gear, crossmember questions

Nope, not on a manual trans setup. The automatic converter hole was smaller in '67 and earlier slant's and 273's, but, not a manual pilot bushing for a manual trans crank. If you have an automatic crank that hasn't been machined for a bushing, there are conversion bearings out there that can be used. They fit in the converter hole instead of the pilot bushing hole.
I ran into this when converting my /6 64 Valiant from 3-on-tree to 65 A833 4 speed. (Keeping the B&T)
Anyway I had shifting problems as the car warmed up. Rather than stay with a new Oilite bushing in the crank, I went with the newer roller bearing style. (Incidentally Oilite bushings were invented by Chrysler engineers in the 30s)
The OD was too large so I turned it down on a lathe. It appeared to be powdered metal but machined easily. IIRC I went with a .002 press fit and it works fine.