[Ken K]

The springs they used from the factory were soft. A taller spring is easier to compress. If you open the hood and push down on the core support and the car moves down easy, you will know you have soft springs. If you do the same thing with a good set of springs, it does not push down easy. When you remove a coil, the spring becomes harder to compress. It drops the car down a little bit but not like you think will happen. I noticed that the 68-72 A body cars used a little bit shorter spring than the 64-67 cars. The springs still make a lot of the cars sit too high in the front. The #5400 springs are for a 68-72 car, they are 17 inches tall to begin with. The rears springs are different than the front. Variable rate springs in the rear will give you more of a performance spring. They ride normal until you get a load on them and then they are harder to compress.