The Extreme Suspensions Series II '88-98 Chevy kit is the most intense we've ever dealt with. Just look at all those parts! But when it all went together, it equates into one badass IFS kit for the first-gen Chevys. The difference between the Series II kit and the normal Series I kit are the rod end X-bracing in between the subframe crossmembers and the triple shock hoops included in the Series II package. If you're going to get this kit, we'd suggest adding the Series II package.