CP2 - The years are 1970 to 1996.
We've got about half of the original catalogs scanned in and available under the history and vintage photos link.
http://www.wellcraftv20.com/gallery/album01
The i/o in anaheim doesn't look bad at all!!! Although it's hard to say for sure without a close inspection. You'd just need an engine bracket (about $1200) and an outboard.