Some help with a 400
The 787 HP? Our ported Edelbrock RPM's. 580 HP? 906 or 452 heads, I cannot remember which ones we switched to.
Here is a little article from the HOT ROD network on the engine when it made 723 HP on Comp Cams dyno.
2009 Amsoil/Mopar Muscle Engine Challenge LaRoy Engines & ProMax Performance - Mopar Muscle Magazine
We took it home and made a cam change and it went 787 HP on the dyno at Performance Auto Machine in Idaho Falls.
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