It always shocks me to see such ineptitude on public dispay.
12 years parked, they decide to just jump start it and fire it up.
If they really wanted to be intelligent they should have dropped the fluids, put a new set of plugs in it after a nice squirt of Marvel mystery fluid, dumped the fuel and rebuilt that carb. total time, less then 4 hours, fresh fuel new battery and it would be running like the day it was parked.
Instead they make that poor motor circulate oil that probably has enough condensation it to go full milkshake, made it ingest flat dirty fuel and forced those dry cylinders to push their dry rings up in down inside those dry bores doing unknown amounts of damage.
Pity, that truck was loved by the previous owners and it's new owners have no idea of what they have.