It's my opinion that these undersize bushings are a bad idea. The hole is rough drilled, and not finished. Drilled holes do not stay on center and can wander. I have machined many cranks to fit a stock bushing. If you indicate the flywheel register, then the rough drilled hole they are never on the same center. Have seen them off as much as .010". So fitting a bushing to that hole is no different than having the bellhousing bore off location.
