I found the URL to the page with the 5.7 liter GM diesel in a Jeep Cherokee, if anyone is interested.
"So we rigged up a jig that bolted up to the engine mounts (where the transmission would normally be fastened) and supported a precision X/Y cutting tool holder from a metal lathe. We then ran the engine on a frame and used the engine's own power to cut a true-to-center hole and snap ring groove in the end of the crank shaft for the pilot bearing..."
Earle