I installed the kit about a year ago in my 3500, but went with the steel ones instead of the poly ones. I also went with the bilstien shocks. The only problem I had was it increased the severity of the famous "Death Wobbles". Why, I don't know. So I installed the Luke's Link and the Darrin Tessier stabilizer kit. After that it was fine. Just thought I'd stick my two cents in. Good Luck!!
Mike