The stock rear springs should drop right out, provided the shocks are unbolted from the axle. The rear springs in the Edelbrock kit are high-performance Eibach variable-rate coils designed for a slight drop in ride height. Simply lift em in place, raise the rearend, and bolt the lower shock mounts to the axletubes. Youre done. But dont forget to install the zerk fittings and grease the bushings.