Let's start with the reasons to hate the previous owners.
Ok, so there's really only one big one. They gouged holes on the upper rear interior of the cab for 6x9 speakers. The speakers were hooked to a newer stereo head. No audio worked. The radio has since been moved to my father's F**d to replace his busted cd player.
Look in the very top corner and you can see one of the holes. The bench seat is something I got from a late 80's early 90's 1500 out of a junkyard. There were mid 90's bucket seats in when I bought the truck.
In that picture you can also see my "custom" gas tank sitting in on the passenger side floorboard. The original tank was all rusted to hell, so when I purchased the truck, the owner had a 2 gal can with a fuel line running into it. I upgraded to a larger can for the ride home. It was a designated non-smoking drive for obvious reasons. I've since bought a replacement in-cab tank.