500 hp Street Heroes - Cover Story

The Cad does have two weak spots. According to Potter, the valvetrain is "worthless," and he recommends his Cadillac Performance rocker arms. The other area is the stock cast-iron connecting rods. Potter prefers to use Oldsmobile-forged rods that are only slightly shorter. Other than that, Potter says the nodular crank can handle the easy 550 hp this combination can grunt out.

SpecsDisplacement: 500ci, bore x stroke-4.300x4.304Carburetor: 850-cfm Holley HP, Race Demon, 800-cfm Q-jetIntake: Edelbrock Performer, PN 2115Heads: Stock 950 cast-iron heads, heavily ported 2.190/1.840-inch valvesCompression: 10.2:1Camshaft: Comp Cams, custom-grind hydraulic flat-tappet 255/245 degrees @ 0.050, 0.550-/0.550-inch lift, 110-degree lobe separationHeaders: Sanderson 171/48-inch primary pipeExhaust: 3-inch exhaust with DynoMax mufflers