Pretty sure this is a 1966 Cadillac Calais, which is essentially a De Ville with a lower level of trim and amenities. Even this relatively downmarket Caddy still cost >$5,000 in 1966 dollars.
Under the hood is a 429c.i.d. V-8 rated at 340 SAE gross horsepower. Next thing to nineteen feet long and weighing over two and a quarter tons, this is a whole lotta car.
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