ATK HP74 Chevy 350 Vortec 1996-2000 Truck Base Engine 315HP

This engine is an upgrade for 1996-2000 Chevy trucks or SUVs the ECM must be tuned and headers are needed to get the full potential out of this engine. We test this engine with an aftermarket EFI system on an engine dyno, power ratings may vary. Your engine may not necessarily come with all components listed, but they are listed as our recommendations of parts to run for optimal performance. Engine Specifications: HP: 315 TQ: 400 Block: OE roller block 4 bolt main 1pc seal 1996-2000 Bore/Stroke: 4.040” x 3.480” Displacement: 350CI Crankshaft: OE Reground external balance rear of crank/internal balance front of the crank Rods: OE powder metal 5.7” Pistons: Hypereutectic 9.3:1 compression Rings: Moly Camshaft: Hyd. roller Cam Specs: 198/210 @50 .435in/.462ex 114LSA Timing Chain: Single roller Cylinder Heads: Vortec cast iron 64cc 1.94/1.50 Rocker Arms: Stamped steel 1.5 ratio Oil Pan: Rear sump 5qt (not for Chevelles with steering behind crossmember, some corvettes and 62-67 chevy II’s) Oil Pump: Melling STD volume Recommended Components: Balancer: Internally balanced – PowerBond 8” #PB1487-N Flexplate/Flywheel: Externally balanced – Pioneer #FRA-159 168 tooth Intake Manifold: Stock Distributor: Stock (Iron Gear) Water Pump: Stock Fuel Pump: Stock Spark Plugs: Autolite #605 Spark