Just to let you know, you basically just have to watch the FS section and find somebody parting out some spirit or something. I got my prop valve that way. I had the whole setup except the prop valve, and then I found a guy parting out an 89 Shelby, and got it that way. Just to let you know, the Spirit, Aclaim, Shelby, and GTC all had those rear brakes. Good Luck.