By now we've all seen GT500s with big blowers, but this is no stock engine sporting a blower swap. Moreover, it's not just an upgraded stock engine. Lethal had big plans for its last GT500 project, which were to culminate with the installation of an all-aluminum 5.4 built by modular specialist Al Papito's Boss 330 Racing. Based on a Ford GT aluminum block, this engine features CP Pistons, Manley I-beam rods, custom Boss 330 cams, and ported GT500 heads courtesy of Kris Starnes Racing. Topped by a 4.0-liter Whipple Super Crusher supercharger this engine was good for more than 800 horsepower at the tire.