7.4 Vortec Performance Upgrades Guide
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7.4 Vortec Performance Upgrades Guide

The 7.4 Vortec put down 290 horsepower and 410 lb-ft of torque which is nothing crazy for a 454 cubic inch engine. Fortunately, GM overbuilt these engines and then underpowered them, leaving a ton of room for performance upgrades. With internals that are good for over 800hp and a block that can handle more than…