replaceing coil springs and shocks front and rear

Rubber isolators aren't used on the bottom of the front springs because the springs sit in a pocket in the lower control arm. When they're used on top you reuse the old ones. It helps to tie them to the springs with string to hold them in place as you poke them up into the frame. If the upper isolators aren't used or aren't reusable, the front of the car will sit about 1/2" below specs but it will still be higher than what you had with the old weak springs.