Hey all I was thinking about getting caltracs for my 3500 dually but on caltracs website they only list for the 2500. So I'm wondering if these will work on my truck I know the axles are the same but the spring pack is alot thicker not including the overloads then a 2500. Any info on this would be appreciated. ( or any other suggestions on how to get my 2.4 60 foot down some)