Yes, as far as I know is that the body wasn't swapped for show, but most likely because a tree or something fell on the bed and back of cab.

 

Also it must've been one interesting character who owned the F100. They not only added the integral AC but also look to have welded in the floor panel that has the hole for the 4wd transfer case. They had to have put a lot of money into converting that F100 to 4wd from the way the transfer case slot is. No missing paint, all holes aligned, even the paint overlaps the hole and matches the cab which is a sign that the truck had a full interior out respray. Some serious love was given to that F100 before something happened and it got parted out. I don't have any better pictures but you can see that the T-case hole looks factory from how well done it is.

I'll take a better pic next weekend that will show the neatness of the cut.
(EDIT) Also notice that the speaker next to the shifter was mounted up under the dash and was also mounted very neatly from what I can tell.

 

I just did some questions asking on the diesel swap forums of the internet and it seems like the best solution to kill two birds with one stone is to buy an already Perkins swapped dentside and just use that as a parts truck AND a source for the engine. Still need to find a bricknose parts truck because I want to use a ZF-5 and also I want to see if I can adapt the diesel tac over to my dash and just rewrite the numbers on the original dash. If not, is there a way I can adapt the bricknose dash to my dentside? I just want all of the gauges and lights to work properly without just switching over to an electronic dashboard.

 

I know it's been a bit. I couldn't get any pictures but I did some work this weekend and have learned that the 351M I have is completely junk. See, I pulled all 8 spark plugs in for some strange reason every single one was corroded. I don't see how every single cylinder could have had a valve that was open. The air cleaner was off, but only one or two spark plugs would be corroded then. Also a quick look with an inspection camera showed that it wasn't just the spark plugs, all cylinders had signs of water. Knowing this, I pulled the drain plug and I have never seen so much water come out of an oil pan on something that has been sitting for less than 30 years. It only sat for 14 and there was at least 3 quarts if not more that came out. Crystal clear too. A bar on the crank had proved this water had taken it's toll. Currently trying to get the rear drivers side axle freed up so it can be pulled to see if that will break it loose. In the mean time... anyone want a trash 351M? Didn't think so.

 

It's been even more of a bit and I know nobody cares about this thread but I don't really care. I pulled the carb off last week and determined (drum roll please)...
The engine is completely toast
I didn't even know so much water could get into an engine that sat for 15 years. In fact, I now know how every single cylinder got water in it: I think the valves got rust-jacked open. So sometime soon I'll be pulling the engine. The main thing is, I now have a harebrained idea that might just work on how to get *most* of the parts I need for what I want to do. Enter desk this video: I have been a long-time viewer of this particular channel and it hit me recently on what I should do. See, although he says he is going to do an "epic drive line swap", he doesn't usually follow through with these big projects he proposes. Although he lives in central Iowa and I live in western Pennsylvania, it would only be a weekend trip to head out, pick up the truck, and head back. Once it's home, the cannibalization begins. Essentially take the best parts from each truck (mostly just the engine, the glass, and some body panels of the Perkins truck), and put it all together to make good, reliable, fuel efficient 4x4 dentside. All I need to do is save up some money and make an offer.
Getting away from the engine swap it's time I throw out some other ideas.
As far as the bed I was thinking of modifying an 8ft dump bed in to something that sort of reminisces of a Rebco loggers-box, enter picture below:

essentially shorten the headache rack, get rid of the sideboards (and possibly shorten the sides based on the bed), and give it a regular pickup style tailgate
I never mentioned it, but I also thought that a good color would be the original F100 Sequoia Brown that is already on the cab, just doing away with the two tone. I think it would with it quite nicely, and I can't think of another color that would be just as "non-flamboyant" as that (besides black but I have a personal reason for not wanting to use black).
Again, sometime in the next few weeks I'll post a few photos of everything I've done for the past little bit, but right now I can't seem to find the cable for the camera that I used.

 

We care and we are still reading, and we all have our projects to work on. What you have sounds like a cool plan, keep up posted on the outcome. I like the Rebco loggers box, it is like a Army trailer bed.

This one needs some adjustment.

 

Keep the pics coming!