IntroductionAcarburetoris a device to mix air and fuel forinternal combustion enginesin the proper ratio for combustion.The fuel and air mixture is too rich ifit has an excess of fuel, whiletoo lean ifthere is not enough. Therefore,to make sure the proper engine function and have anice driving experience, a goodquality carburetoris highly recommended.ApplicationCompatible for Ford F350 4X4 1974 F-350 Pickup Base 4.9L 300Cu.In.l6Compatible for Ford F250 4X4 1974 F-250 Pickup Base 4.9L 300Cu. In.l6Note?Only Compatible for Ford straight-six engine 240, 250, 300 engine YF C1YF 6 CIL 1975-1982It could also be used for Many compatible for jeep CJ5 Engines Old compatible for Ford With single barrel YF 7109S carburetor, Carburetor Repalce compatible for Ford RSC-300A,6307S,6054,6055,6-736,6056,6057,6058,6059, 6061,6240,6241,6244,6246,6308,6077,6170,6349,6350.(You may need to adjust mixture, idle, and float adjustments. )SpecificationIntake Inner Diameter: 43mm?1.72in?The longest distance of m