[irishman331]

Thanks Crewsin,
You're likely right on the money. Even though this is clean, I don't think they were really big on the maintenance thing and likely has original plugs. The air filter element was so black and gummy it was probably starving for air. Of course I replaced that, but if that's how they maintained the cheap and easy parts, I can imagine how plugs would have been on a priority list.
Thanks again
By the way, Ford changed the Exhaust Gas Oxygen sensor circuits a bit by adding a heating element to the sensor hence the H (heated)EGO. You don't want to touch one of those babies if the key is turned on while it's out of the cat. Whew. They're hot.