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scicala · 03-20-2020, 07:44 PM

The spark valve was added to the Holley for the Y-Block V8 in '54 (EBU carb). It was also used in '55 and '56 on the Holley two barrel (ECG-5 and ECG-6).

The carb you posted with the spark valve appears to be a '55 or '56 truck carb (1 1/16" venturi) that someone installed an earlier throttle shaft and levers on.

Sal

03-20-2020, 07:44 PM	#5
scicala Senior Member Join Date: Jun 2010 Location: Detroit suburb, MI Posts: 3,698	Re: New Carb Question The spark valve was added to the Holley for the Y-Block V8 in '54 (EBU carb). It was also used in '55 and '56 on the Holley two barrel (ECG-5 and ECG-6). The carb you posted with the spark valve appears to be a '55 or '56 truck carb (1 1/16" venturi) that someone installed an earlier throttle shaft and levers on. Sal