When i was looking for aftermarket pulleys for my BBC, i realized the passanger side alternator mount is for SHORT water pump applications, and the drivers side alternator mount is for LONG water pump applications... Not real sure about the differences between SBC pulleys but that was my understanding for BBC's and where the alternator was located.
Just something for you to think about... It would suck to find everything you need and then go to put on the belt and realize it lines up with the other style water pump. /forums/images/graemlins/doah.gif /forums/images/graemlins/rotfl.gif /forums/images/graemlins/whistling.gif
Also, check march performance pulleys.. they make alternator mounts..
Part # 20121 and 20124