Buick odd fire flywheel...

Then you should be fine, as you started with a crank that was drilled to accept the pilot bushing. I've seen v6 cranks that were intended for automatics (cars of course) that had the pilot hole drilled to accept the center (on the crank lathe) to machine the journals, but it wasn't drilled to the size of the pilot bushing. It's not something you can accurately drill yourself. If you started with jeep v6 crank, or any crank intended to be used with a stick tranny, you'll be OK.