Carburetor Manufacturer: Holley: 1 BBL; Carburetor Models: 1904, 1960. Part Type: Carburetor Repair Kit. Carburetor Kit. 1956 GMC Truck Engine: 4.4L L6; Carb MFG: H-1; Carb Model: 1904;. 1960 GMC Truck Engine: 4.4L L6; Carb MFG: H-1; Carb Model: 1904;.
