Holley Metering Block - For NASCAR Carburetor (0-80583-1) Helmet Shield Bolts have 1/4"-20 threads and

Bolts have 1/4"-20 threads and a built-in captured washer

Smooth Top

1960-1968 Chevrolet K10 Pickup

1970 Chevrolet Caprice Base CID 400 Naturally Aspirated GAS

1964-1984 Chevrolet El Camino

Holley Metering Block - For NASCAR Carburetor (0-80583-1) Helmet Shield Bolts have 1/4"-20 threads andHolley Metering Block 134 280 For NASCAR Carburetor (0 80583 1) Metering Block Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors powered every NASCAR Cup team and nearly every NHRA Pro Stock champion for four decades. Now, Holley EFI products power these cars and are dominating the performance world. Holley products for GM's popular LS engine are dominating the LS scene as well. Holley's products also include