Performer 351-4V is designed for street 351C and Boss 351 Fords that came stock with 4V carb and heads. Performer 351-2V is designed for street 351C and accepts 4V carb, however its designed to improve the performance of engines that came stock with 2V.

This Part Fits:

Year	Make	Model	Submodel
1971-1974	DeTomaso	Pantera	Base
1981-1985	DeTomaso	Pantera	GT5
1984-1986	DeTomaso	Pantera	GT5-S
1981	DeTomaso	Pantera	GTS
1970	Ford	Fairlane	500
1970	Ford	Falcon	Base
1970	Ford	Falcon	Futura
1972-1974	Ford	Gran Torino	Base
1973-1974	Ford	Gran Torino	Brougham
1974	Ford	Gran Torino	Elite
1972-1974	Ford	Gran Torino	Sport
1972-1974	Ford	Gran Torino	Squire
1970-1973	Ford	Mustang	Base
1971-1972	Ford	Mustang	Boss 351
1970-1973	Ford	Mustang	Grande
1970-1973	Ford	Mustang	Mach 1
1970-1974	Ford	Ranchero	500
1970-1971	Ford	Ranchero	Base
1970-1974	Ford	Ranchero	GT
1970-1974	Ford	Ranchero	Squire
1971	Ford	Torino	500
1970-1974	Ford	Torino	Base
1970-1971	Ford	Torino	Brougham
1971	Ford	Torino	Cobra
1970-1971	Ford	Torino	GT
1970-1971	Ford	Torino	Squire
1970-1973	Mercury	Cougar	Base
1970-1974	Mercury	Cougar	XR-7
1970-1971	Mercury	Cyclone	Base
1970-1971	Mercury	Cyclone	GT
1970-1971	Mercury	Cyclone	Spoiler
1970-1974	Mercury	Montego	Base
1972-1973	Mercury	Montego	GT
1970-1974	Mercury	Montego	MX
1970-1971	Mercury	Montego	MX Brougham
1970-1971	Mercury	Montego	Villager