Need some input from you Guys. My denali 08 is going to be on it's forth rack in 4 years. The center bushing on the gm rebuilds is crap it breaks down very quickly. I have been trying to figure out what to do to make it stronger. The rack is held on with straps I believe and floats. I wondering if you lifted and heavily nodded Guys ever seen anyone modify how one is mounted or added dampers or found a better bushing. So far the Internet serves have yielded nothing.