The Edelbrock Divorced Choke Rods are designed for use specifically with QuadraJet carburetors and Edelbrock manifolds. The divorced choke resides on the manifold and has an operating rod from the choke to the carburetor. In general, carburetors with divorced chokes use a separate choke-pull off to open the choke. The choke rod opens the blade wider by rising at the right speed. These quality choke rods are direct replacements for the choke rods on your QuadraJet.