Fits 1981-1987 Chevrolet/GMC Gas Lines (Pump To Carb) GLK436 coolant-level-sensors 0L 1973-1974 Chevrolet K20 Pickup

0L 1973-1974 Chevrolet K20 Pickup Base 6L/4

You can activate one retard for a nitrous stage and another at top end in high gear for more mph and still have another module left over for dual stage nitrous systems

1966-1970 Chevrolet Caprice

1964-1967 Mercury Comet

1990 - 1991 Chevrolet K3500

Fits 1981-1987 Chevrolet/GMC Gas Lines (Pump To Carb) GLK436 coolant-level-sensors 0L 1973-1974 Chevrolet K20 PickupFits 1981 87 Chevy GMC and 1981 89 Suburban 454 4 bbl., 3 8", 1 pc. Application: Year Make Model 1981 1987 Chevrolet C10 1981 1987 Chevrolet C20 1981 1987 Chevrolet C30 1981 1987 Chevrolet K10 1981 1987 Chevrolet K20 1981 1987 Chevrolet K30 1981 1987 Gmc Astro 1981 1987 Gmc B6000 1981 1987 Gmc Brigadier 1981 1986 Gmc C1500 1981 1986 Gmc C1500 Suburban 1981 1986 Gmc C2500 1981 1986 Gmc C2500 Suburban 1981 1986 Gmc C3500 1981 1987 Gmc C5000 1981 1987