The last picture is all the things the previous owner had done to the engine, I have no receipts for it.
When the truck was running it ran like a r@ped ape.
Back yard mechanic took the back half of the trans apart while in the truck trying to fix the backed off 5th gear nut. The trans is still apart and when parked all pieces were covered from the elements.
Someone with the knowledge of these transmissions could have this running within a couple hours.