ATK Engines HP89 Small Block Chevy 350 Base Engine, 390HP

Great crate engine with a noticeable idle, very street able with lots of power. Engine Specifications:• HP: 390• TQ: 420• 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 the crank/internal balance front of the crank• Rods: OE powder metal 5.7”• Pistons: Hypereutectic 10:1 Compression• Rings: Moly• Camshaft: Hyd. Roller• Cam Specs: 220/224 @50 .528in/.536ex 110LSA• Timing Chain: Double Roller• Cylinder Heads: ATK High Performance aluminum with 2.020 in. /1.600 ex. valves• Rocker Arms: Billet aluminum roller rockers 1.6 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:• Flexplate/Flywheel: Externally Balanced – Pioneer #FRA-159• Balancer: Internally Balanced – PowerBond #PB1046-N• Intake Manifold: ATK dual plane intake• Distributor: HEI (Iron Gear)• Water Pump: OE long pump• Carburetor: Quick Fuel 680CFM Vacuum secondary’s electric choke #HR-680• Fuel Pump: Holley mechanical 110GPH #12-327-11• Spark Plugs: Autolite #3923• Spark Plug Wires: 8mm Engine Info:• Oil: Conventional / Non Synthetic 10W30• Oil Filter: Wix or K&N• Timing: 34-36 Degrees• Spark Plug Gap: .035”• Firing Order: 18436572• Octane: 91+• Stall Converter: 2200-2800• Exhaust: 1 5/8