The Monte Carlo was orginally equiped with a 160 HP 4.3L V-6. Well that just wouldn't do so the first thing to go after purchase was the engine. In its place went a Speed-O-Motive 420 HP 383 cu in stroker motor. The motor is equiped with a set of Dart Iron Eagle heads, Flat Top Pistons, and a Comp Cams Extreme Engergy Cam.