Sounds like gasket problem with all the hot/cold temp changes of the seasons. I know it get's cold and hot in O'Fallon as I live on the same latitude as you here in Indiana. If I were you, I would be thinking about pulling the engine and going through it. I seriously doubt your going to get it fired and running/drivable after sitting for so long. You might get lucky but 12 years is a long time and things are going to happen one after another. Some things to consider are the water pump, timing gears and chain, fuel pump, and anything rubber, plastic, or cork. You've already discovered the brake problem, What next? One piece of advise I can give for sure is keep a good fire extinguisher on hand. Don't want to see a good classic go up in flames!