Boring but necessary question

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TylerW

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Would anyone know what size bolts are used in the exhaust manifolds(where the headpipes join) on regular 318 manifolds?

I'm nearing the end of an off and on 3-year project and those were taken off and disappeared to who knows where.

Thank you....
 
I think they are going to be either 3/8" X 16 or 7/16" x 14. One or the other.
 
Thanks. I think the parts store is attempting to sell me the wrong manifold gaskets, but otherwise I'll pick up 4 of both sizes and should be in business.
 
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