good eye, you are correct. I'm stripping my 93. I'm getting all the good parts off of it. the frame would be nice but the driver's front took a small hit. once I have everything apart, if it is straight, I may use it. also it may donate it's 360 and trans to the project too. Not sure if it's a 46RH or RE. either way I have a newer 46RH in my shop. my 73 has a caved in roof so will be donating some body and floor sheet metal. the 78 has no motor, it is just plain backup and will likely be my field/property work truck with the 73's 318/727.
Next is to strip my 72 and start building from the ground up. Mostly, I want to move the gas tank out of the cab to under the frame. I started stripping my 72 but every bolt is pretty much stuck. so I figured i'd practice on the newer truck while getting what I need done, done. then I know how thing should go and hopefully will reduce my struggle with the 72.
There's a surprising number of D100/150s on craigslist to pick from, if you ever make it out this way.