For a 73' Dart LA, post 4 is correct, you have the early LA mounts. The transmission mount has also changed in 73'(but they are also found on an "E" body or VAN or possible truck. The brackets come with the drum mounts, but make sure they are for the 360 and not a 318. I made them work on my Van when I installed a 340, but it took some extra work. There were no 340 mounts for a 72' van.
