I also picked up an ARC 1 from the Navy salvage yard in Jax., Fla across from NAS Jax around 1973.  It came with 10  crystals still in the holder  for the aviation freqs in the Jax area.  After I got it going, it was a treat to be able to switch between all the freqs and listen in, almost like having a scanner.  I ended up selling it, but now have another one complete with rack and control box, but have not got around to getting it going yet.  This one did not have any crystals, that will be an issue, but if you think there was no AM activity on 2 meters back then, the world today has 99% of 2 meter folks unaware the band goes below 146.52.

Charlie, W4MEC