Pilot bushing help.
When I converted my 340 from auto to manual I measured the pilot hole in my crank and it didn't measure up to any available pilot bushing outer diameters, so I used the plug with the needle bearing that fits in the torque converter register hole in the crank instead.
Last winter I decided to go back to the automatic for the HOTROD Power Tour and when I pulled the four speed out, the needle bearing/plug just fell out of the crank!
I got a larger oilite bushing and had it milled down to fit my strangely sized pilot hole.
No more needle bearing plug for me.