657 HP with a 509 cam? Not by me!
I thought this was one of the happiest around
http://www.hotrod.com/how-to/engine/mopp-0207-intake-manifold-engine-and-rpm-range-test/
Looks like there is a new leader.
The MM engine is a better HP build and it still pales in comparison. :)
Maybe they forgot to list the 100-125hp shot of NOS? Hmmmmmm
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