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    exhaust manifold prep

    Curious about my 85 6.9l f250 exhaust manifold gasket surfaces. With new heads, I want to make sure I prep the ex. manifolds correctly. Is there supposed to be a concave ring on the manifolds? It appears that way in some spots, but not others. What is the correct way to mount the metal gaskets...
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    exhaust manifold bolts/studs-nuts

    Hi guys, super new to this forum. Joined recently due to my dumb removal of the cork seal holding the thermostat check ball in. Found a great mod, followed the directions and voilá, success. Please forgive if this posting is in the wrong spot, I take correction well ;) Where can I purchase new...
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