Kind of a bad time of year to get it started, but you would want to disable the fuel pump, spray fogging oil into the spark plug holes and let that sit overnight and then bump the starter a bit at a time to move the pistons. Then re-engage fuel pump. Drain as much as the old gas you can out of it and add 94 octane an change oil before you fire it up. Let idle an hour.
The rear drums might be seized. You will need a jack and a large breaker bar to work the rear wheels.