Click the link my signature. Seems to me like if you know your way around the LS1/F-Body then taking about 10 minutes of your day to read what I typed up will really help ya out. What I WOULD honestly do, is just go get a set of lifetime warranty plug wires, pick up some new autolite 606 spark plugs, gap them at .060"...or .050"...whichever you want. Also, I've seen MAF's screw with these cars and not throw a code. Try unplugging that to see if that changes anything. Just a thought.