That would be a 1965 426 Wedge. Do you need one for a project car? The guys who have original '65 street wedge cars will pay a premium to find an original engine since they are a little hard to come by. Mopar didn't build a lot of 426 street wedge cars, that engine wasn't available for very long. It wasn't a great performance engine but it is desirable for guys doing restorations.