This is an original Ford carburetor modification kit which is correct for all 1967 Ford V8 engines equipped with the 4300 4V engines. Ford came out with this kit to correct engine cold running problems and acceleration "stumble" problems. There was a Ford TSB to to correct these problems with this kit which consists of a new choke cap and accelerator pump modifications. After you install this kit your car will run smoother and have more power.