I just found this and thought some might be interested. It explains alot about the PSOM and has a cool way to get around the speedo sensor issue when doing a rear axle swap. I think mud and the elements might be an issue but check it out.
new sensor location tech article (http://216.239.37.100/search?q=cache:af_GfsiitaMJ:members.aol.com/jzettel73/Military_Axle_Swap_5.html+Ford+10.25%22+disc+brake +conversion&hl=en&ie=UTF-8)

nice find

ttt:thumbup

The above link is no longer operating.....at least on mine it comes up as not matching any documents.

here's the correct link:
Ford Speedo Gear on Military Rear (http://members.aol.com/jzettel73/Military_Axle_Swap_5.html)

Ive been to his site before, theres some interesting stuff there:thumbup

Thanks