Not Ranked
The Hurricane is using a completely different block, from what I know, it will be an overhead cam engine like the Mod motors. Probably an aluminum block also.
As far as the CHI heads, you can get 550 HP from ordinary heads (AFR 205s, etc.) on a 427 Windsor motor. For street use or even open track use, I don't imagine most people could use any more power than that. (In fact most people, myself included, couldn't begin to use that much power).
Kevin
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