Trick Rear Springs, General Motors Intermediate 1968-'72 For: Chevelle, GTO, LeMans, Cutlass, 442, Skylark, Gran Sport, Malibu, Monte Carlo, Grand Prix, Regal, Grand National Computer designed rear springs engineered to compress at a controlled rate when car is launched for optimum squat Right-side spring is stronger than the left, allowing the car to lift evenly upon launch for balanced weight transfer and more consistent 60-foot times CNC-wound from high-strength chrome silicon wire to maintain accurate spring rate and to handle the abuse of hard launches Replaces stock OEM springs with no modifications required Track proven by professional racers for optimum performance Two per package with black painted finish Where can I get my car weighed? Most towns have a public scale that you can use to weigh your car. If there isn t a public scale in your town, check with your local race track or truck stop. The Proper Procedure for weighing a car In order to get the required weights for spring selection you must weigh your car in three different segments. Before weighing the vehicle be sure that it is race ready (driver on board, fuel tank filled, correct amount of ballast added). Roll the car onto the scale so that only the front tires are centered on the scale and record the scale reading. This is your front end weight. Next, roll the entire car onto the scale making sure that it is centered on the scale pad and again record the scale reading. This is your total weight. Finally, roll the car off the scale so that only the rear tires are centered on the scale pad and note the scale reading. This is your rear body weight. Now that you have all the necessary numbers you can determine which spring is correct for your application.