This is the pictured water neck outlet for the vehicles listed below. It can also fits other GM various vehicles.

Note that this has the threaded opening for the temperature sensor.

Fits:

• CHEVROLET	BEL AIR	1974-1975
  CHEVROLET	BLAZER	1970-1974
  CHEVROLET	C10 PICKUP	1967-1978
  CHEVROLET	C10 SUBURBAN	1967-1978
  CHEVROLET	C20 PICKUP	1965-1978
  CHEVROLET	C20 SUBURBAN	1967-1978
  CHEVROLET	C30 PICKUP	1968-1978
  CHEVROLET	CAMARO	1975-1977
  CHEVROLET	CAPRICE	1974-1981
  CHEVROLET	EL CAMINO	1975-1980
  CHEVROLET	G10	1970-1972
  CHEVROLET	G20	1968-1972
  CHEVROLET	G30	1970-1972
  CHEVROLET	IMPALA	1974-1981
  CHEVROLET	MALIBU	1974-1981
  CHEVROLET	MONTE CARLO	1978-1980
  CHEVROLET	NOVA	1974-1978
  GMC	CABALLERO	1978-1981
  GMC	SPRINT	1974-1976
  OLDSMOBILE	CUSTOM CRUISER	1977
  OLDSMOBILE	DELTA 88	1977
  OLDSMOBILE	OMEGA	1978
  PONTIAC	LEMANS	1976-1978
  PONTIAC	PHOENIX	1977