This is the 1978 Mercury Grand Marquis 2-door hardtop sedan. (The 4-door versions fit the same classes.)
Image: Mecum Auctions
Engine Choices:
351/145(230) R-T-
U/SA, SS/PA
400/160(240) Q-R-T/SA, SS/PA
460/202(320) L-M-N/SA, SS/LA-MA-NA
Data: Class Racer Info