Quote: as this is something I am interested in as well!
I remember reading that truck timing covers suuposedly work better in the older chassis' but I can't recall why
Car timing covers put the alt down low, the truck covers put them up pretty high. Depending on the chassis, at least B/E/A, the car cover is more sought-after.
You can see where the truck cover sticks things on this one out of an '06 Ram