GM Goodwrench Truck 5 LM7/L59 285HP Crate Engine - JEGS The Vortec LM7/L59 5 V8 Engine is for light duty GM trucks, sport utility vehicles, and vans. It has a cast iron block, 285 horsepower, 325-330 ft/lbs torque, 96mm bore, and 92mm stroke. Share this page: Chevy Performance LS-Series Engine Blocks - JEGS High GM took a chance with the LS engine. They stayed true to the pushrod small-block and continued to develop this technology to the point that building a daily-driven, 500-plus HP car is no big deal. The GM Performance Parts LS Series cylinder blocks are designed specifically for late model small-block engines that run the LS Family cylinder heads.