Thanks for the input. I decided to give it a try....it was ONLY 100 degrees in Dallas today and it took me about 8 hours. It was a tedious job, though everything seemingly came together at the end...HOWEVER, when I went to start the car, expecting success, it wouldn't start! It cranks, sounds like it wants to start for a couple seconds, then just keeps cranking. I scanned for codes and got a P1300 (Igniter Circuit Malfunction (Bank 1 Or No. 1)). YIKES! I may have more trouble now than before I tackled the knock sensors. At least I could drive it before, but now I'm without wheels. Any ideas? Thank you!