Yeah, there are a few still around. I forget the exact production number but I think there were around 20 to 25 built with most of them being 1966 and 1967s. The link you posted mentions small block Cheetahs. I don't remember ever seeing any info on any small block ones. There are a couple guys on the Canadian Poncho site that one one or more.
James
Cheetah Beaumont Canadian Poncho