So I'm thinking of replacing my springs/struts to correct my massive case of ass sag. I've read the intrigue springs pop it back up to a good stock look and have variable rate springs so they are better than the stock grand prix ones. My question is are the struts interchangeable, will it bolt right onto the grand prix? I want to buy the strut spring assembly so I don't have to deal with compressing the springs on and off the strut since my struts are do for a change anyway.