After seeing your pics, I can tell your truck is in need of similar extensive work like mine!
My first question to this board was on whether to remove the whole front clip, or take off radiator/grill to remove my engine (motors mildly frozen).
On your truck, since you too are dealing with two locations, may I suggest the possible idea of removing the front clip, loading it on a trailer, then working on the engine while it sits in truck? Lots of room to get to it.
I have found it very important to keep ANY big sections of the truck always able to roll (just in case you need to move it).
That truck could split in 3 workable pieces that 2 could transport individually on a small trailer. Remaining chassis (with new bed or pintle/gooseneck) would even fit easier on big trailer or even tow better (if needed you can thin truck down by removing 1 each of outer rear duals).
1) Front clip with whole radiator, inner/outer fenders, headlight parking wiring, etc. {that's enough work to keep you busy a while!}
2) Cab ,with all interior etc.{more work now or for winter}
3) Try and leave motor, steering, brakes in a "rolling" chassis & frame. If motor doesn't need a rebuild, you can do the frame easier, brakes, wheels and maybe hear it run and shift gears. If not able to fix engine, pulling motor/trans will be a breeze.
I intend to get mine running and then decide if I want the cab/clip restored.
A lot of my local paint shops would prefer me to have a rolling clip and rolling cab versus a whole big truck cause it takes up less room in their shop, moves easy, and the job goes faster.
Your progress will go faster if you can easily get to the work.
Good Luck and whatever route you choose, take more pictures!