Just what is the differences between the car and truck valve bodies
Ford has different valving/calibrations in them than the car VB's, just minor changes. That isn't a problem by itself. The issue is that all VB kits are made only for the car VB's, common performance applications. So the VB kits sometimes don't work the same way in a truck VB. It's the worst with the serious shift kits, not the common minor kits designed to correct OEM issues. TransGo makes both kinds, and their correction VB kits do well in everything. The HD kits they have, I keep reading that they don't play nice in trucks much. So the suggestion is for serious usage, get a car VB to do the good shift kit in.
If you just need to get the AOD working again, most VB's from 87-93 could work, but be sure it's coming from a properly running trans.
Don't use a police AOD VB, those have a change to only 2nd gear(low), not 1st. Those have 2/D/O/R/N/P gears. A B&M shift kit didn't work right in that 86 police car I had way back when.