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Old 08-11-2002, 08:47 PM
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Post 400 poncho information

Alright guys and gals I'm here to learn.

My late bro Randy told me that all poncho heads with mid to late 40's casting numbers on the sides are good heads, what I want to know is what the number means and where if not here can I find that out.

Another thing, are the engine mounts the same as a BB chevy? Reason being I'm building a frame from scratch and wonderd iif I can buy a pre fabbed crosmember with BB chevy mounts and still work, they are both GM, but that doesn't mean bupkiss, juuuuuust wanting to make sure.

3rd, ant inexspensive rebuild kits out there that one of you guys can recommend and possibly give me a link or number to?

Much apreciated.

HK

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Old 08-12-2002, 06:26 AM
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Here is one of the sites I use for checking castiing numbers. Can't help with any of the other stuff except to say that Pontiac is different from Chevy in a lot of ways including location of the starter. <a href="http://www.yearone.com/updatedsinglepages/Id_info/pontiacengineid/pontengid3.html" target="_blank">http://www.yearone.com/updatedsinglepages/Id_info/pontiacengineid/pontengid3.html</a>
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Old 08-13-2002, 07:57 AM
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What year is the Pontiac 400 you have? My personal experience has been with 68-79. As far as heads go, I would recommend a mid to late 70's head....ie. 4X-4 or 6X-4 or even 5C or 6S or 7K3 for a 400. These would all have a good compression Chamber size for compression to run pump gas, and have hardened exhaust seats for unleaded fuel. If you want something from the late 60's the 670, 46, and 16 heads are all desireable performers. I am actually going with a set of 6X-4's on a 455 build up.

BB chevy mounts will NOT bolt up to the Pontiac block they are different. You should be able to find a set of Pontiac engine moutns in just about any boneyard.

I use several website, mostly <a href="http://www.classicalpontiac.com" target="_blank">www.classicalpontiac.com</a> and <a href="http://www.wallaceracing.com" target="_blank">www.wallaceracing.com</a>
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