The Edelbrock 94 Carburetor power valve block off #12624 is a great way to fine tune your vintage series carburetor. These Edelbrock Power valve Block Off's will fit Edelbrock Vintage Series 94 carburetors as well as original Holley 94's and its later variations. A gasket is included with every power valve block off. Also it fits any Demon, Holley and Quick Fuel Carburetors with a 1/2" x 28 power valve thread