G. Matsushige
grant@cfht.hawaii.edu
They have pulleys in several configurations.
I have two piece pulley set which replaces crank (drive) and altnernator. Works okay, disadvantage is if you sit around in stop and go traffic a lot your alternator is not charging battery. Bad is you are running air condition etc, will put a major draw on your system.
Hope this helps.
Aloha,
g