Its worth more to sell it - versus what you can take a garden 455 and buy better caps for plus machining included.
That code would be only for early built cars.
And would be used for HO and Ram Air applications.
Dec 69 or so they went to code YC for the same engine.
Might be worth running the PHS on the VIN
17 Judges were built with that block code and only 1 has been documented and known to still exist .
www.wallaceracing.com has a Data Base for lost / found engines to help re-unite engines and cars. And could make a post about it in the 70-72 section here on PY .