2 post vs 4 post for long term storage

Hi all,

I am thinking of getting a lift to store my 67 convertible dart.

A 2 post would be the most useful but I suspect storing a convertible (or any other car for that matter) on a 2 post with all the cars weight on 4 points might not be good for the long run.

4 post makes the most sense for ease of use and storage and offers MOST the same usefulness.

What say you?
I did some research before I purchased my 4 post lift. All 2 post lift manufactures state in their owners manuals that the 2 post lifts are not intended to be used for storage.