ATK HP89CBLKDS Chevy 350 Complete Engine 390HP

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 HP aluminum 64cc/195cc 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 • Valve Covers: Cast aluminum powder coated black “Chevrolet” embossed with matching PCV valve & push in breather • Flexplate/Flywheel: Externally Balanced • Air Cleaner: 14”x 3” Super Flow air cleaner system with washable filter (drop base lower) • Balancer: Internally Balanced • Intake Manifold: ATK dual plane intake • Distributor: Black HEI (Iron Gear) • Water Pump: OE long pump • Thermostat Housing: Chrome with a 180 degree thermostat • Carburetor: Quick Fuel 670CFM vacuum secondaries electric choke • Fuel Pump: Mechanical • Fuel Line: Dual inlet AN Stainless Hose from pump to carb • Spark Plugs: Autolite #3923 • Spark Plug Wires: 8mm • Drive System: Holley 20-240BK mid mount accessory system with AC, alternator and power steering 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 Headers Disclaimer: The parts listed are ATK’s recommendations of parts to be used to obtain our power figures listed. Power figures can vary based on parts used by the end user. It is the customer’s responsibility to verify components will work in their application. Some modifications to the vehicle may be required using these and other aftermarket parts. ATK reserves the right to substitute parts used in engines if necessary.