How about a little NASCAR with your Mopar? With the Challenger's unibody finally straight, it's time to install shock wave air bag suspension and a trick fully-adjustable K member. Then it's new spindle tech, big disc brakes, plus how to make a muscle car look like it's laser-aligned. Then in this week's Muscle Car Flashback: the limited production '70 AMX, American Motors' Javelin-based pony car.