Awesome oddball. Absolutely worth something to someone who owns a car that came with that originally...... bad part is, there a very few of those, and only a tiny handfull would have and want a correct engine for those cars. Most would rather throw in a 413 (or 440 for ease of piston source). Since it's so rare tho, I'd make the darn thing a man cave coffee table and keep it useable before I'd dispose of it. No one really knows it's value in the future.
Just for everyone's reference, at this point in time; 350B, 361, 383B and 383RB, 413 and 426 wedge are all really considered obsolete engines. A lot of parts interchange, but good pistons, if any pistons, are no longer off-the-shelf for any of those motors.
**edit** im finding 383b pistons, but the rest on that list are no-go.....custom only $$$