ATK HP31 Chevy 350 87-95 TBI Base Engine 290HP

This engine was designed to run with all your vehicles stock components. Must have a chip burned, upgraded intake and headers for optimal performance. Engine Specifications: HP: 290 TQ: 373 Block: OE block 4 bolt main 1pc seal 1987-1995 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 9.1:1 compression Rings: Moly Camshaft: Hyd. roller Cam Specs: 198/210 @50 .435in/.462ex 116LSA Timing Chain: Double roller Cylinder Heads: OE TBI cast iron 67cc 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 #PB1046-N Flexplate/Flywheel: Externally balanced – Pioneer #FRA-159 Intake Manifold: OE or Edelbrock TBI intake #3704 Spark Plugs: Autolite #605 Spark Plug Wires: Factory replacements Water Pump: OE Engine Info: Oil: Conventional / Non Synthetic 10W30 Oil Filter: Wix or K and N Timing: Set To Factory Specifications Via PCM Module – Must have Performance Chip Burned Spark Plug Gap: .035” Firing Order: 18436572 Octane: 91+ Stall Converter: Stock Exhaust: 1 5/8 Headers Notes: Engine