If you want really good information DANNO is the on to ask.
Seriously, I've pondered the premiss of the car in the show. Have you looked into what the story line says ? Supposedly the car is an ex-race car (NASCAR, local dirt tracker, they don't say). Whats up with the push bar? The Revell / Monogram kit is definitely the way to go, but now you have to round up some bits and pieces, decals,push bar, wheels, etc.
Here's another one for you, headers,I don't think I've ever seen or heard mention of them in the show or on the car.