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Click on image for the lowdown. 
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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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| | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 |
If it is a 54/55-1st exhaust manifold, I'd bet it used a doughnut (unless 54/55-1st H-D Chevy trucks used a different manifold from the lighter trucks).
I have, however, sometimes been successful using a later flat-gasket with a "doughnut" manifold and a flat-mating-surface (later style) exhaust pipe.
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