426 hemi or 426 wedge. Both a no go in Canada. The biggest engine in the B body Plymouth or Dodge was the 4-bbl 383 V8.
Personally I wouldn't touch it at $6,500. And that is US $6,500. The person that placed the ad maybe in Moose Jaw, Saskatchewan (Stuart Maxwell), but the car is in
He makes a clam it is a Canadian model but comes up with absolutely no back up information - no VIN, no body tag, no instrument panel - nothing. All he has is a 1968 Roadunner 383. It needs work. Says he has put at least US $9,000 into the car (going by his list).
The worst part of the Canadian 1964 Polara 500 and Sport Fury is that both do not have unique model numbers - they are the same as the lower priced Fury and Polara. So, production numbers are not known and there is no way to verify what it is.