Traditional Evolution
When asked why he chose a World Products "Motown" block to base his Challenge entry on, Sherman told us flatly, "I've researched this point thoroughly. I honestly believe aftermarket blocks are worth more than 20 hp over conventional production car blocks, especially when we're talking about race engines. I've taken high-performance innards out of a stock block-based performance engine, dropped them into an aftermarket block, and saw a marked increase in power with no other design changes."
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