Thank you all for the wonderful advice! I will start with working on the engine first! I will take some more pictures soon and post them here.
Brocky, you asked if we have the fire apparatus bed, no we do not. The cab is currently sitting on a pallet on the frame. I just need to clean up our shed a bit more then I can get it onto the ground. Thankfully most of the rust is all surface rust, but there are a couple patches off deep rust that will need to be replaced on the cab. I have 0 body work skills so it will take a bit longer to get to that. Thankfully I have some family who has offered to help teach me. But I am hoping that most of the work will be done at home.
Steve, you and I are almost on the same path. My current plan is to put the truck back together, fix things along the way, and clean it up. Get the truck drivable and on the road again! It will still take a long time. Eventually, I would love the truck to be fully restored, but with the cost of doing that, I am thinking about doing it in pieces. Get the truck all back together, then when I have the money, take off one thing and fully restore that, then put it back on. It would look pretty silly at times, but that is part of the fun. That is my current thought process. Thankfully, my dad got the chassis and a few other things fully restored, so I don't need to worry about those.