I've been away on business for several weeks and just hit my favorite bone yard, the local "pick your part" and it must be my lucky day. I was walking through the Ford section when I looked in the engine compartment of a 91 notch and I saw what turned out to be an oil cooler. There is a bit of rust on the intake and discharge but looks to be a good solid unit. I looked the door jam over but there were no DSO numbers so I took the booty and ran- no pun.
Were the liquid to oil coolers dso/ special service specific? There is a bit of rust on the intake and discharge but looks to be a good solid unit. I did find a ford part #: DT6B856AA
http://s189.photobucket.com/albums/z...oilcoooler.jpg
http://s189.photobucket.com/albums/z...oilcoooler.jpg
RSH