What makes aluminum heads produce so much more power?

[mustangII460]

Aluminum cylinder heads as stated before transfer heat better from cylinders, producing more power.
With aluminum cylinder heads you can run alot more compression.
Of course aluminum head are of late design and incorperate the latest in, "Swirl" technolgy.
Adding together heat trasfer,3 angle cut large valves and the latest technology of flow, aluminum heads are great.
The down side of aluminum heads is cost. I will probibly get a set in a few years when cost comes down some. In the mean time i will continue to grinding some iron.