I hate seeing this! Another original 833 gone to toast!
Once this is done there is no return unless one has lots of standard input shafts!
I got burned by this in 1982, My 383 had the crank bore and the bushing, when someone made this mod on a trans I purchased. My Super Bee was never correct and had clutch issues until I figured out what happened.
The Folks at Eaton Transmissions in Atlanta fixed me up When I went to buy replacement parts and bearings. Without the crank support it kept burning the front
bearing and leaking badly!