1) Make sure your anti-freeze is good.
2) Pour the recommended amount of fuel stabilizer in tank.
3) Some methyl hydrate in tank will help prevent moisture buildup.
4) Pour half a litre of Dexron II or III into crankcase. This will help clean out any sludge buildup.
5) Start engine and let warm up.
6) Remove air cleaner & pour Dexron down carb. Shut engine off.
7) Drain
oil and remove filter.
8) Replace
oil and filter.
9) I usually cover my car and put it up on stands for the winter.
10) I usually "click" over the engine occasionally to prevent compression damage to the valve springs. Do not start engine, as this will cause condensation in the crankcase. This condensation will combine with unburnt fuel and create a corrosive element which will eat away at your main bearings.
11) I also put the car on a battery tender.