2 Barrel Carburetor 2100 A800 For Ford F100 F150 F250 F350 289 Cu 302 Cu 351 Cu. for Ford F100 F150 F250 F350 1965-1985. 4.9 L 300 cu. 4.1 L 250 cu. A carburetor is a device to mix air and fuel for internal combustion engines in the proper ratio for combustion.