When the classic you cherish goes into storage, it is urgently recommended to empty the fuel tank or completely, disconnect the supply hose to the fuel pump and then blow it with high pressure or fill it up to the cap.
This is because alcohol is used in current gasoline, which leads to rust formation in the tank. The latter - filling it to the brim - has the additional advantage that you drive the first few hundred kilometers in 2011 on 'cheap' gasoline, because in 2011 the go juice to be even more expensive ...!