Here's a thoroughly hooptified version I spotted in a San Francisco Bay Area self-service wrecking yard last month.
The Omega Brougham was the top trim level, and it came with large expanses of fake wood and hard plastic inside.
This one has the Landau roof, which tended to be a focal point for rust on GM cars in California during the era.
The 1977 Omega could be purchased with 260- or 350-cubic-inch Oldsmobile V8s, but this one has the base engine: a 110-horsepower, 3.8-liter Buick V6. Good news for Buick V6 buyers in 1977 was the switch from the "odd-fire" crankshaft (a money-saving move that used three-quarters of a Buick 215 V8 crank) to the much smoother "even-fire" crankshaft, so this car wasn't quite as rough-running as earlier V6s.
The Omega name went onto badge-engineered Chevrolet Citations for the 1980 model year, and you could still get the Omega Brougham then.
Compact Omega: A lot of little Olds!