1973 is good, but it should be a Cadillac...Eldorado.
I had a chance to drive one of those 1973 LeSabres around for a few years, and it was such a boat that was fun to drive it left an indelible mark on me! It belonged to my dad (a career navy guy) and we ended up painting it haze gray all over with spray cans in an afternoon, and wanted to put navy style block numbers on the bow, a formal name on the rear, and cleats on each front fender, but got sidetracked, like squirrels, on other things.
Eldo, yes (the 2 cars flanked by the Sedans). 1970 -- better 500 cu. in and a 10.1:1 compression ratio.