I just looked at this advertisement and I feel for their "very proud" asking price it would have the original A-318 with a better Air Cleaner Housing and The Heater Hose's routed to The Heater than a newer LA-318.
That is a pretty 1962 Plymouth alright. Not sure that the owner knows that he has pretty upholstery on his door which has the DODGE emblem instead of the PLYMOUTH emblem, but maybe he doesn't care. $37K is a tad expensive for a car with an LA 318 instead of the poly, which is what it should have.