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