Tim, there are over 100 boots in the ford truck master parts catalogue for under base numbers 2a713, 7242, and 7277 for f500, f600, c-f-t750,f900, and f1000. there was no f450 but the f250 and 350 had the pull handle under the dash. the f500 through f1000 had 4 different park brake configurations with the "orschlein" type being the most common but it was dependent on the transmission type as to how the park lever was configured. call me for more info on what you need. I have every ford parts book for cars and trucks from 1925...john brown