call bob here....
http://www.exoticperformanceplus.com/ he's the one that built the moser 9'' that came with my car...even though i didnt buy it from him he was still nice enough to answer some of my questions about the build order from the previous owner when i broke my driveshaft. you can get the 3:70s from there too
do it. do it

best mod you can do.