1974 Pontiac GTO - Swan Song
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The No46 cylinder head was used on most '73-'74 350ci applications. It was, however, the only casting used on the GTO 350ci in 1974. Not to be confused with earlier castings from 1969, the '73-'74 No46s also had small intake and exhaust valves but received threaded rocker arm studs after mid-May 1973. View Related Article
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