Today was dyno day and things went great. A stock 5.0 makes 165 hp at the wheels so with aluminum heads and new cam I was hoping for 265 at the wheels, and that is also what a computer simulation said I would get. I got 264.8 hp @ 5307 rpm and 271.6 ft/lb @ 4839 rpm and a power curve that rises extremely smooth and linear. It showed no signs of a misfire so either the new plugs fixed it or my ram air system is so effective that it's putting the engine into a lean condition at speed. Here's video of the dyno session and a picture of the power curve.
Video of dyno session
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