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3999241....72......oval...OPEN...402, 454, 113cc chamber
I`ve heard of changing the port shape, there was a thread on it here before, they say it works. This was all the info I could find on them. It doesn`t say there peanut port, so I`d have to say there the medium oval port. |
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those heads are great heads for the street. casting #'s 049, 781,241 and 820 are the best large oval ports from the factory. I would check it for cracks first before spending any money in them. and more then likely u will need to add hardened seats if it does not already have them.
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