I'd park it inside, drain the tank & forget it. There isn't much you can do outside. Rust gets the metal. Eventually locks the engine & trans. How long before you strip it?

__________________
85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.