I've "Been there, done that" too.  When I did my 2.3 Turbo swap I had a perfectly good C-4 trans with 86,000 miles on it. Asked around and got no interest. I tripped over it for a few years then sent it to Pick A Part to get my $18 core charge when I put a 700R4 in my Studebaker.

The complete 2.0 (runs but smokes) is still sitting on the back patio. It's worth $65 as an engine core at Pick A Part.  Id rather convert it into cash as that takes up less space and weighs a whole lot less.  Tried here a number of times, but no interest.

I have a '63 Rambler American with the ancient 196 engine.  I want to do an engine swap but at times am tempted to just rebuild the engine.  But parts are rare and expensive and that engine is a weezer too.  Anyway, I had stored a spare crank, cam/lifters, rods and pistons for 'someday..., maybe.'  Evetually I sold them for scrap. But now..., if I do decide to go the rebuild route I sure wish I would have had those things back.  BTW, one of the engine known to fit the Rambler (many don't) is the 2.3 engine.  If it was what you were told I'd have gladly given you the $23 for it.  Unfortunately these are just not things that can be put in the mail.