For that length of time, either remove the battery, or put a battery tender on it. I store mine over the winter and use a tender on it. Also, before you cover the car at least wash it, but if you have time, wax it, too, it will prevent scratches from the cover. Before you park it, put Sta-bil fuel stabilizer in the tank and top it off. Gas starts to go bad in about 3 months, this will make it last until you are ready, and a full tank will not have space for condensation to form. When you park the car, pump the tires up to 50 PSI to prevent flat spots, just put them back to about 35 before you drive it.
Susquehanna Valley GTOs