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Originally Posted by cyclone427428
...I heard aluminum heads dont really work well on the street...
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There's not the least bit of truth to that. My Ford 5.4 has a cast iron block and aluminum heads as do many other factory engines. If it works for the factory...
Also, because of the increased heat dissipation with aluminum heads, you can run an extra half point of compression, ie 10.5:1 instead of 10:1.
It's your engine, do what you want, but good heads and a cam to match will really wake up an engine!