Get some Berrymans B12, and pour it into the manifolds when they're off the car. For the throttle body, a spray can of Berrymans B12 works quite well at removing the gunk built up.

For spark plugs, you are best sticking with the original Motorcraft or Autolite plugs. You have several oprions when it comes to plug wires, although the factory wires are generally pretty good.

... and my car will do a little chirp into 3rd if I shift right don't do it all the time though, unless you plan on rebuilding your transmission soon.