hotforz

I have a 1982 280ZX Turbo. It has been in storage for about two years now, without being driven. I have kept the gas tank full and treated with "stabil" a gas stabilizer. It is in an unheated garage, with a wooden floor with plastic sheeting under the floor to prevent moisture. The garage is well ventilated. The car is also covered with breathable cover.
This car is in mint condition and I would like to keep it that way. I have heard that gas tanks have a tendency of rusting, when stored. Is there anything else that I should be doing to maintain this car while in storage?