This Knafel Pontiac may be a Canadian Pontiac Acadian. I used to see Acadians and Beaumonts (A-body) all the time up in Canada. A few years back at the POCI Nats, a guy had what looked like a 64 Nova, but it was an Acadian with a 427 stuffed under the hood. They never made them with 427's, but it was a cool concept. Definately drew a lot of snooty looks from GTO guys as they passed by, with phrases like "How did that Chevy get in here?"
The only reason I think this may be a Knafel Pontiac Acadian is that it appears to have a split grille.