Stabil fuel stabilizer and disconnect the battery or connect it to a float (NOT TRICKLE) charger.  If your other fluids are good, that should be it.  That's all is do and it's worked for the last two years.  You might want to put some 1/2" plywood under the tires to keep them from rotting.

even if you store your vette its still a good idea to start it about every two weeks,and take it for a quick ride if weather permits.