1976 was, in my opinion, Peak Brougham. It was the last year for the truly large premium sedans, the Cadillac Fleetwood, De Ville, Oldsmobile Ninety-Eight and Buick Electra. Over at Chrysler you had Royal Monacos, Gran Furys, New Yorker Broughams and even the wood-paneled Town & Country station wagon. And over at Ford, there were myriad examples of big luxury cars to fill your requirements: LTD, Marquis, Country Squire, Colony Park, and Continental sedans and coupes. At at the very top, the finest, the Continental Mark IV.
1976 was the final year for the Mark IV, which first appeared in Autumn 1971 as a ’72 model. My grandfather ordered one in triple dark green, to replace his triple dark green 1969 Mark III.
In my opinion, the 1972 was the prettiest with its small, integrated front and rear bumpers. In 1973, the Mark IV, along with most other Detroit rolling stock, got the new 5-mph front bumpers due to new federal regulations. In 1974, a larger rear bumper was added to match the front.