The 1964 motor from the wreck, on the bench, cleaned, terminals scuffed bright, ground too and looking ready for service.
Protect the paint, release the hold down tab with a sharp hook, pop the wiper arm off the drive spud * 2.
Remove the seven Phillips screws holding the cowl and seal to the cab.
Remove the cowl and seal.
The wipers should have been in the full parked position....lock the transmission arms against turning and remove the jamb nut that holds it all together on the output shaft of the wiper motor.