| [GMCnet] Casting number on right exhaust manifold. [message #262115] |
Wed, 17 September 2014 00:30  |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
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The gasket between the head, and the right manifold was blown out. Pulled the manifold, and found that the manifold has the start of a small crack. So I went to my parts stash. The cracked manifold that I removed from my 78 403 casting number is 554581. The manifold from my stash is 411970. It looks a little different. But I think it will fit. As all the angles look right. Anyone able to fill me in on this?
Thanks, Bob Dunahugh GMCMI Member
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