I had posted to your other thread about measure the hub of the convertor and the hub of the crankshaft, post# 26. he's right on about work on the convertor hub only,and yes the convertor should move freely in and out of the crank but it is a michined fit as this is the support for the front of the convertor.to clean up the convertor hub I would use a file and old fashioned hand labor,egg shaped hub will destroy something