In Reply to: Re: Ford NAA crankshaft won't drop to remove old rear seal posted by Joel on April 11, 2019 at 14:20:02:
Look around for one of those flexible shaft drivers or cannibalize a flex shaft off something. Most Dremel tool sets have one. The end may be too large, cut it off and you have a flexible punch that should be able to drive the old seal out no matter how cooked it is.
The front of the crank is also held by the front seal, so be careful you don't mess that up and create a new leak.