I think just a small tweek of the LS3 to 450-460hp would be more then enough. And in the numbers they will produce, wont damage the CAFE numbers.
Z28 should be something weighting as much as a V6 Camaro, with more power then the SS, and the handling and brakes of the upper Camaro.
Maybe get a hand-built unit like whats in the Corvette GS and have dry-sump...but we are talking about a decent amount of money now.
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2/20/2013: They Day the ****s Stopped
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