Go to the top right of your screen and you will see a drop down called "Data" drop it down then go the 1973 and the decode info is there. Pretty easy each letter number on the sticker tells you what came on the car. You should also have a metal plate attached to the radiator support right up next to the top under the left front fender. The the best thing would be to find your build sheet under your carpet or upholstery somewhere.
Let us know if you do not see what you need there.