The best you can do is store the car with a tank full of fresh gas mixed with the proper ratio of StaBil or similar product and if at all possible start/run the engine up to full operating temperature at least once every month or so. Besides cycling older fuel out of the carb for fresher fuel, you will also help to circulate the rest of the fluids, etc. 15-30 minutes of running should also keep the battery fairly happy.
My $.02,
Gene