Highest flowing sbm heads?

bigfoot said

Trying to get this thread back on track, what would you guys spec for a 700hp 416 ci pump gas build?

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It's a cool idea in concept but to do it, naturally aspirated, would be a pretty significant feat. You need a lot of high end parts working together very well to get that kind of torque high up in the rpm range.

Now, under boost.... different story of course.