Found on http://www.thesamba.com/vw/forum/viewtopic.php?t=495197
Because I took a moment to post http://justacarguy.blogspot.com/2011/05/vw-engines-identification-info.html from my desire to help share car info, found on http://carrosehistorias.blogspot.com/2010/08/numeracao-de-motor-boxer.html