Introduction Acarburetoris a device to mix air & fuel forinternal combustion enginesin the proper ratio for combustion. The fuel & 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 & have anice driving experience, a goodquality carburetoris highly recommended. Application Compatible for Ford F350 4X4 1974 compatible for F-350 Pickup Base 4.9L 300 Cu. In.l 6 Compatible for Ford F250 4X4 1974 compatible for F-250 Pickup Base 4.9L 300 Cu. In.l 6 Note: Only Compatible for Ford straight-six engine 240, 250, 300 engine YF C1YF 6 CIL 1975-1982 It 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, & float adjustments. ) Specification Intake Inner Diameter: 43mm(...