Posted as a sticky by member request:
2008 Ford SuperDuty diesel-powered trucks, F-250 thru F-550:
Roughly, 2008 Job 1 trucks were produced in the first half of 2007. Job 2 trucks were produced in the second half of 2007. And Job 3 trucks were produced in 2008. So if you find a new Job 1 2008 on a dealer's lot, it has been sitting there for well over a year. And a Job 2 truck has been sitting there for about a year. A Job 3 truck will have been sitting there for only 3 to 9 months.
To see what was included in Job 1 trucks, and what changed for Job 2 truck, click on the following link and skip down to about page 11 and start reading until you finish about page 32.
What's new for 2008? ... Basically, they added some options for Job 2 that weren't available for Job 1.
Next, click on the following link:
Sunrise Ford Fleet Download Center, change the model year to 2008, and download the 2008 order guide for your choice of pickup. The Job 3 changes are listed in that order guide.