Its interesting to scan the Internet and see the various solutions to pilot bearing that have been tried. Roller bearings, bushings, teflon, nylon. Each generation seems to have developed an "improvement" to a bearing of dimensions/application for the Ford flywheel "pocket."
Almost tempting in a way. Except it IS a lot of work to pull an engine to make the change/reversion if found unsuccessful.
Google Bearing 6203. The options are legion.
Joe K