ClifFord,
Welcome to the forum.....
I might suggest visiting our sister forum,
www.oilburners.net
That is by far, the best resource for the Ford/IH/Navistar 6.9/7.3 IDI engines.... we have several members that have been around the IDI's since they were new on the lot.... We even have a couple members that have 1 owner trucks, one of which is the owner of Conestoga Diesel that makes the Moose Pumps, and his 83 F-250 "Moose Truck" that he ordered new in 1983......
If you have a question about an IDI era truck, someone there WILL have an answer for you. Also, it is a very friendly culture, unlike many other forums on the internet..... we have many members, including myself, that have met and made good friends with other members of the group. The annual rally is a much anticipated event for many.....