Yes. There will probably be a few thicknesses to choose from. I try to get the thickest I can drive the car onto.
Also, you may want to buy a couple of tarps (the big blue kind) to put underneath the car (to hold moisture down from coming through the floor).
In short, I put tarps on the garage floor, foam sheets on top of the tarp (where the tires will go), drive it onto the foam, and cover w/a car cover.

Also, make sure to use STA-BIL or the like in your gas, put a thing of baking soda or mothballs inside, and change the oil/filter prior to storage.

Here are a couple of sites that have some good tips for storage:

http://www.musclecarclub.com/library/show/storage.shtml

http://www.popularmechanics.com/how_...86.html?page=1