The Shelby Cobra had originally been introduced with the Ford 260 cubic inch V8, an engine that balanced power and weight requirements well for the small car, and was able to fit into the engine bay. The original plans for an engine upgrade had been for an aluminum V8 that would either not significantly increase weight over the front wheels – or maybe even slightly decrease it. Sadly this was not to be, and Carroll was lumped with the solid but heavy Ford 427 cubic inch V8.

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