i talked to this guy at the GM nationals this past summer.
http://www.retro-electro.net/home.html
currently he only lists conversions for camodes, but, it was a pretty hot lick set-up, not cheap though, not by any means.
asked about 68/69 goats and his eyes lit up, said he was working on a conversion and to check back at the end of the year.
also said they wouldnt be as $$$ as the chevy ones due to needing only one motor.