Thank You For the Response HevyHauler !!

Maybe I should take a 3 eighths OD plastic tube and blow the coolant out of cylinder number 3, then put in some penetrating oil ???

You might be right on the non pressurized cooling system. I should look at the cap. It might be a vented cap...

There sure isn't much rust on this truck. The fender bolts are comming out nice.