How do you find a exploded view of the automatic transmission of a 1968 Chevrolet corvair?

Personally, I would ask the folks at the national corvair club, CORSA. They have an email-based forum for such questions, called VirtualVairs. There are some Corvair manuals on Ebay, as well as Clark's Corvair Parts in Mass. Just do a search on any of those names to find the websites. Good luck.