C5ZZ-9430-B Manifold

That's the inventory number. It should not be marked on the manifold. The marking (casting number) is C4ZE-9430-A.

Jim

I have heard that the early repros had a "fit" problem that was eventually corrected. A "fit" problem is what I found that I had on my date coded originals. Number 4 spark plug had a "fit" problem and needed to be installed with the manifold loose and with a socket on the plug. There's a thread with all the associated gory tales on this website. Just for sanity's sake, place your manifold on a known flat surface with the four exhaust flanges down and do a careful eyeball before you do anything.

Jim

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Jim, The "fit" problem is ongoing as I have posted regarding this a few weeks ago. I spent quite a bit of time modifying the left side on a current repro to be able to remove and install the spark plugs. This went far beyond simply loosening the manifold and raising it up before retightening it as you can get away with on an original. It was necessary to do a lot of grinding as there is too much casting material in the path of the spark plug socket.

-Fred-

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Fred,

I was commenting on the fit of the repro manifold. The second part was my own situation on my factory manifolds which I addressed in the post you referenced in your next post. I don't know what the problem on the repro manifolds was, but from what you had to do, it appears to be in the same area, only worse.

Jim

There is a cast iron restoration specialist here in Washington, in Auburn who repaired my cast iron manifolds. Would a repair be indicated? <img src=images/icon_smile_big.gif border=0 align=middle><img src=images/icon_smile_big.gif border=0 align=middle>