WebApr 11, 2024 · To identify your Pontiac 6x head, you will need to first remove the valve cover from the engine and then locate the casting number stamped on the top of the head. The casting number should be a two letter and five number combination. Additionally, if you look at the side of the head, you will find the “6x” imprinted into the metal. WebApr 9, 2024 · If you’re looking to get maximum performance out of your Pontiac 400 engine, ... To make things more simple, he installed a RA IV cam, ported 6X heads, deamon 825 Carb, RPM intake, dougs headers, and a 3-inch pipe in the back. It has 450 horsepower and 500 horsepower plus a combined power density of 500+ feet/lbs.
The Power Of Pontiac: Exploring The Impact Of The 670 Cylinder …
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Pontiac 400" 6x heads - Don Terrill’s Speed-Talk
WebJan 1, 1999 · The 6X heads are popular and plentiful; most '76 to '79 350s and 400s had them as standard equipment. ... Pontiac #96 Head Flow Numbers (at 28 inches of H2O) … WebApr 11, 2024 · To identify your Pontiac 6x head, you will need to first remove the valve cover from the engine and then locate the casting number stamped on the top of the head. The … WebJun 10, 2024 · The 6X heads have the much needed for a 455 size motor 3 to 4 CC larger Intake port that the long stroke of the 455 ... 73 Ventura, SOLD 455, 3740lbs, 11.30's at … how to remove fan blade from motor