Does this guy know what he's talking about?

All slant six cranks have the hole drilled for the pilot bearing/bushing. Not all cranks had the hole "honed" to the correct size. At one time it was possible to buy a pilot bushing with a smaller OD from NAPA, that would fit the raw drilled hole. As far as I know that bushing has been discontinued for several years. I have taken a stock bushing, and turned down the OD in a lathe so it would fit the raw hole. With the late (1968 and newer) crank you can use the roller pilot bearing that fits in the converter hole.