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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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#36942 04/18/2003 4:05 AM | Joined: Apr 2003 Posts: 22 New Guy | | New Guy Joined: Apr 2003 Posts: 22 | I aquired an Ellis Dualpower Aluminum Intake manifold that I was hoping to use on my 248 GMC engine, but it is quite a bit larger than my current stock manifold. My current 248 intake manifold measures ~18" from center to center of the end intake ports and the Ellis manifold measures 21". It actually has GMC cast into the bottom of one of the Intake ports. Does anyone have any idea what Inline GMC engine this manifold fits? My intake does have 4 numbers cast into the bottom, The first intake port from the front has two numbers 361 & 477, the middle Port has 426, and the back port has 451 GMC. On the side under the DUALPOWER it says "L.A. 23 CAL." Is the manufacturer of Ellis intake manifolds still in buisness?
Jim
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#36943 04/18/2003 6:29 AM | Joined: Feb 2001 Posts: 1,897 Member | | Member Joined: Feb 2001 Posts: 1,897 | The manifold sounds like it fits the large GMC engine like the 308, up to the 503 
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