ApplicationCompatible for Plymouth models1966-1973 with 273-318 engine compatible for Dodge Truck 1966-1973 with 273-318 engine (Please compare your carburetor against pictures to ensure you will get the right item.)SpecificationBolt Hole Spacing Length Width?82.2mm ?47.5mm(Center To Center)Intake Side Inner Diameter?36.5mm?two same?Choke Air Horn Outer Diameter?66mmIncluding: 1x carburetor gasket Condition: New Material: heavy duty zinc alloy Instructions: not included Accessories: You will get exactly as shown in the picture above one year warranty for any manufacturing defect Notice - The oil channels of carburetors will be blocked without cleaning.Please clean up the oil channels and air filters as well as use the clean fuel before installing the carburetors. - Professional installation is highly recommended (No Instruction Included) - For any needs please contact us.