Gordon Olsen & Bob Stone entered in the Baja 1000 in 1979 with a 1976 AMC Pacer in Class 6 (production cars). The 4.2L in-line 6 was tuned to 200hp. It finished 2nd behind a V8 Ford Ranchero, only 2nd because it an impact punctured the radiator.

https://en.wikipedia.org/wiki/AMC_Pacer#Motorsports