the diff / ring gear issue yet. I just saw one of the Cusco distributors selling the Cusco ring gear which I didn't know that they made. I though that only Nissan sold the gears. If it is separate, it shouldn't be that expensive [compared to a solid gold engine mounts]. Glad to see that you are keeping the Z then. 9.5 to 1 sounds nice for autoX. Sport 500's would spool yesterday..... twin T78's at 15psi would be neato.