This MotoRad Radiator Cap Adapter fits your 1978 1977 GMC K35 4.8L 5.7L 6.6L L6 V8 and is perfect for a tune up or performance upgrade. .
MotoRad Radiator Cap Adapter for 1976-1985 Plymouth Colt 1.4L 1.6L 2.0L 2.6L xh
MotoRad Radiator Cap Adapter for 1984-1985 Renault Encore 1.4L 1.7L L4 - pi
MotoRad Radiator Cap Adapter for 1994-1996 Mercedes-Benz C280 2.8L L6 - ok
MotoRad Radiator Cap Adapter for 1981-1983 Plymouth PB350 5.2L 5.9L V8 - vg
MotoRad Radiator Cap Adapter for 1975-2002 Chevrolet P30 3.9L 4.1L 4.3L 4.8L lz
MotoRad Radiator Cap Adapter for 1975-1978 GMC C25 4.1L 4.8L 5.0L 5.7L 6.6L wv
