Here's a little video, just to show the difference you can make in the performance of a Hot Wheels by modifying it.
This is the '69 Chevy that was just in the Muscle Truck race. I've built several of these trucks and they are a simple mod. If I were to run the wide fte's, it would just be a wheel swap, but, I like the normal width fte's, so I have to put an axle tube in it.
Let me know if you have any questions.