Cutting A833 Input Shaft Question

^^And further if you want to do this without ruining "what's there" you can screw around and find a piece of tube/ pipe / conduit to use as a bushing to protect the hole that is already there.

What I was contemplating on my 5.9 "drill" was to make a converter bore plug (slip fit) in the lathe, center drill it for pilot and use it to establish center. I could then keep drilling the plug out on the lathe until I got the crank clearance hole done. The crank could have been turned to "full size" later if needed.