It actually looks better than I expected when I read the ad, and the condition looks very good, the colors are good, definitely one of a Kind, can be yours for the low low price of only $39,000.00. Its well equipped, powered by the 425 V8. Old enough to still have Ducks on the Cadillac emblems! https://quadcities.craigslist.org/cto/d/east-moline-1977-cadillac-eldorado/6868209941.html
That is a Cadillac engine. The Oldsmobile 425 had been out of production for 10 years when this car was built.
They may look similar, but the valve covers give it away as a Caddy engine. And that is a GM corporate blue, which started ending up on many late '70s GM engines, from the 1.8L four-banger on up.