Not Ranked
I'd spend the money on a lightened rotating assembly, unless of course your worried about weight for handling.
As for aluminum blocks being strong enough....Ford just happened to screw up big time with their Cobra blocks.
Other manufacturers, BMW, Chevy, etc do fine making gobs of power from their engines. (Z06 anyone?)
-steve in nj-
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"I wanted to meet interesting and stimulating people of an ancient culture and, kill them."
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