Toby,
I can well appreciate the difficulties in trying to restore a vehicle and enjoy the hobby whilst serving at sea. Use your spare time for research, parts purchasing etc etc. There are plenty of things that you can do to compliment your restoration whilst at sea. It took me ten years to restore an Amphibious Jeep when I was in the Navy. I was also amazed at what Naval Stores still carried in stock for Jeeps (not sure now of course). I still have the list of DSN's somewhere. The other thing was how many Amphibious jeep parts (Engine, gearbox, T'case radiators etc etc) that I could fit into a Patrol Boat
Rest assured the time will come when you will get some work done on the Chev. Perhaps a posting to Navy Office.
Anyway enjoy your sea time
Cheers
John Wilson
(Ex CPOMT)