Replacing spark plugs Taurus 3.0 Vulcan 12 valve engine?

Not too difficult. The three on the front of the engine are really easy to get to. A 5/8 inch deep well should do the job for all of them. The back three were a little more difficult and required an extension for the deep-well. I accessed them from the passenger side of the car but you'll have to run the new plug wires from the driver's side. You may have to break some clips that The most difficult part of the whole tune up was the plastic heat shield that the back three plug wires run through. This runs over the engine and clips together in a couple of places. Speaking of clips, I had to break a couple of the stock clips that keep the wires stationary and above the engine (for heat purposes). Once broken, half of the plastic clips remained and allowed for the wires to be easily snugged in so that they're not touching the engine. For the long plastic shield running to the back of the engine: You'll have trouble getting an 8 mm (?) socket on the bolt necessary to remove the clip. After I ran the plug wires, I put the shield back in place and forced the wires back into the shield. It took some time, but afterward I zip stripped the shield together, as the clips that hold it together didn't seem very sturdy. Good Luck - but all things considered, it wasn't too difficult.