Some quick observations...
I could imagine if I were trying to re-use the wires, it would've been much tougher. It takes some force to get those bastards out. Because i replaced the wires, a pair of pliers made it a snap.
The number 1 plug was a PITA because it seems like the trucks entire electrical system is in front of it. BTW, what's the sensor on the head near that plug?
I was able to do all the plugs from the top. A swiveling ratchet and extension really helped...but the #8 required an offset wrench on the spark plug socket, and I could only do about 1/8th of a turn each pass. Definitely a slow process but nothing really tough. One of those ratcheting box-end wrenches wouldve come in handy.

 

I think that is the coolant temp. sensor.

 

I have a special tool that clips into the groove in the factory heat shields. It's about 18" long and pops them off much easier than pulling on the wires.

 

Compared to some of the vehicles that I've changed plugs on, I'll change plugs on these trucks all day long, they're really a piece of cake IMO. A short wobble extension makes #8 a snap

 

While I was in there, i kept thinking damn, those stock exhaust manifolds are begging to come out

 

Take the plunge.... loose the manifolds and don't look back.

 

Oh believe me, I want to...but if my fiance saw a big box at the door thats not wedding related, my *** would be in a sling

 

Get them shipped somewhere else bro!

 

LOL...enablers

 

lol, im getting married in october just ordered my ebay set and had them shipped to work! couldnt pass up stainless long tubes and y for 200 bucks!