1985 GMC Crate Engines

ATK High Performance GM 454 525 HP Stage 1 Long Block Crate Engines

ATK High Performance GM 454 525 hp Stage 1 long block crate engines are updated versions utilizing later model blocks. They offer better street-ability and power. They require an electric fuel pump. ATK Stage 1 or base engines are designed for those that may have their own component parts already, and who also are interested in completing out the build themselves. Typically ATK GM 454 525 hp base engines consist of: * OE Gen V block with 4-bolt mains * OE cast crankshaft * OE steel connecting rods * Hypereutectic pistons * Chromoly piston rings * Hydraulic roller camshaft * Aluminum cylinder heads * Billet aluminum full roller rocker arms * Timing set and cover * Oil pan, oil pump and pick-up tube * Valve covers

5.0 out of 5 stars ( 2 )