I agree with George, the biggest problem with storage is the fuel system. I have many ready bottles of fuel stabilizer, and many ready cans of penetrant since my little 67 122 gets very little drive time. I'm just so attached to my 240 wagon. I really should take her out more often. Gee, I'm making myself feel bad as I type this...anyhow...

Fill the tank, and dump several bottles of fuel stabilizer in the tank. If the car sits for more than 6 months, dump in another couple of stabilizers. Change all of your fluids, replacing one quart of your oil with Marvel's mystery oil. If you have pets, change your coolant over to Sierra or Prestone Low Tox, if a leak develops with the car sitting, it is more likely that a pet can ingest it. Change your brake fluid to eliminate any water that has accumulated unbeknownst to you in the system, so the calipers don't lock up. Pull the plugs, Marvel's into the chambers, seal them off. Spray every bolt you can find with WD40; regularly spray your brake line bolts and calipers with WD40. Again, like George said, if the car will be sitting for any length of time, wheels off, car up onto jack stands, tires flat on the ground, and condition the rubber regularly. The tires will dry rot and flat spot otherwise.

I actually have a Volvo green book detailing readying a car for storage. I'll look at it on Monday to see if I or George has forgotten something crucial. I'm sure if we did, someone else will share their insight.

Chris