John, I believe that you had posted a similar question on the LCSCA about the extra barrels. I believe that if the gun came from the factory with 2 barrels that one would have a 2 stamp on or near the lug. The 2 stamp would let the workers know that this barrel belonged to a certain gun.
Also the one set of barrels with the 24" length, not saying that they would not make a set that short, so I would definetly wait for the letter from Cody stating what was shipped and how long the barrels were. If you are saying the 24" barrels are miking up modified than that shows you that the barrels haven't been cut down. The chokes in L.C. Smiths are usually 1 1/2" + in length. A .410 modified choke would be +/- .390.
As far as restoring your gun back to original, re-blueing both barrels, annealing and re-casehardening, nitre blueing the trigger guard, and refinishing the stock could cost from $2,000+, and then it will still be a re-finished gun. I would check out the options and see from a reliable source which would be better.
Good luck and let us know about the letter or post it on the LCSCA.


David