I might be getting to a city this coming weekend where there is a shop that sells and installs the Carli joints. As there is a limited supply I will need to have a set held for me. The only hold back I have is the cost. I am thinking that they may be worth it as I plan to keep this truck for a long time. To those of you that have installed these are they going to do the job and keep doing it or should I go with a Spicer and hope they last?