Here's a pretty good source:
http://www.ancientsites.com/aw/Post/101410 It gets into the Spanish friars' versions which I don't think can be completely tossed aside by the modern revisionists who write their own versions. I guess everything has to be taken with a grain of salt ---but the friars were closest to writing down the Indians' oral history ---- the modern day versions are more likely to be politically correct and completely erroneous.
In San Jose, California, they already have a $500,000 sculpture of Quetzalcoatl in the inspired form of a big pile of dog poop. Click picture for a funny story about it.
Note that Park God spelled backwards is Dog Krap.