'58 Convertible s are fairly rare with only 2,134 made. As Jed said, not that many are known to be left. When you open the drivers door, on the post that the door closes on, you should find the Data Plate there. On that plate, it gives you the VIN #, the information on the car model, which should be a convertible, color of the car, the interior color, the date it was scheduled to be built, the tranny and axle in it all when it went down the line. Here is a link that will give you more information about the '58 Squarebird. As Jed said, grab it if it is really good condition. We have a Vehicle Check List you can use to check out the car with. You will find it at the bottom of the Technical Resource Library, the link to which is always below my signature element. Print it out and run the check list against the car.