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Do you know what year it is? I found something, very limited in description, about it being a "thin-walled" engine. There are some sites offering mods for the 1956 Chevy 265 and some specs on that engine, but the Pontiac seems limited. If it is anything like the 301 and 400 than you can probably interchange parts though the heads may flow less than the 400 heads on that 265, assuming they are even interchangeable. It seems to me that parts will be hard to find and expensive as all Pontiac parts seem to be. Let us know if you find anything more about it.
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