I just put a set of SSA8 Super Springs on. I used the upper hole of the springs to install. Took vehicle for a ride, no noises or negative effects. Was stiffer for sure. Ride Height: Stock: 48.5" (measured over centerline of rear wheel) Super Springs: 50.5" Empty Trailer (dual axle open car hauler): 49.5" Going to test with car on trailer today. In any case, is there a recommended setting on the SS? Upper hole, lower hole? Any pitfalls to watchout for? Thanks.