High CFM heads - What would you chose?

PRH said
Nice job on these.

Very similar to what was done to the stage 6’s used for the Moparts Enginemasters entry many moons ago.

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Here is a pic of them in progress:

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Wicked! Anyone ever had bad epoxy let go when closing the floor and raising the roof like that? I had to only do this once to an intake not a head.