Block has number 6512 4780 stamped in it. Accelerator pump passage is open. Block was removed from a core carburetor. See pics for condition.
Holley 4150 Carb Rebuild Kit Double Pumper 4777 4778 4779 4780 4781
Holley 4150 4776 4777 4778 4779 4780 4781 Double Pumper Carb Kit HighPerformance
Holley 4150 4-Barrel 4780 Carburetor Secondary Metering Block 800 CFM 2b 6514
Holley 4150 4-barrel 3c 4780 Carburetor Main Body 800 CFM Double Pumper Racing
Holley 4150 4-Barrel 4780 Carburetor Primary Metering Block 800 CFM 3c 8543
Holley Carburetor Rebuild Kit 390 - 950CFM For Holley 4150 Carburetors
