The lawyers would have a field day with his choice of words in that poster. Saying that "This car not only retains the correct matching number..." is specificaly implying that it was this particular car's engine to begin with. You cannot retain something that did not originate with that car from the factory. It cannot be matching number if it doesnt match the VIN of the car it is bolted in to.
What he should have said was: "This car CONTAINS the engine..."
Even a first year law student (or a fifth grade English Teacher) could win this case.
My crystal ball says that if this car sells and the buyer later claims he was mislead by that advertisement, there will be a buyback in the future.
BTW, it is an awesome looking car, though. I do love red on red cars.