Trimming four speed input shaft.

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!
Nobody's saying anything about not having crankshaft support. Where did you see that even implied? It's a very accepted mod and done correctly has no ill consequences.