Fitment: For Plymouth models1966-1973 with 273-318 engine For Dodge Truck 1966-1973 with 273-318 engine Features -Choke Type: Mechanical Choke -Material: Heavy Duty Zinc Alloy -100% brand new, aftermarket part -High performance Carters style carburetor replacement -Add 5-10% horsepower and maintain near stock fuel mileage -Flange gaskets and air cleaner gasket included -Directly replace the old/broken carb -1 year warranty -Interchange Part Number: 273-318 , 273318 , 273 318 8211S, 14-161, 14-142, 14-130, 4113, 4959 2280 R 40165, C6060, C6062 Size: - Bolt Hole Spacing Length& Width: 82.2mm×47.5mm (Center To Center) - Intake Side Inner Diameter: 36.5mm (Twin) - Choke Air Horn Outer Diameter:66mm - Venturi Diameter: 31mm Package Included: 1x Carburetor Flange gaskets & air gasket.