Hey Boots,
Here is a link to OldMagnets picture of my 17-a alternator setup. I purchased it from Dana @ Florin Tractor. It's a simple setup, works great. Look at second picture in first post on thread.
http://www.acmoc.org/bb/showthread.php?23039-Santa-Margrita-Pics
In the day I used to see Cats show up at a down town Fresno used parts seller's place with a belt drive set up.Not as neat and clean a set up as pictured but it worked. The generators had been gutted and the shaft sticking out the back end of the case with a pulley and mounting brackets welded to the generator case.The pulley size can be adjusted to get proper speed for your alternator.