ATK High Performance HP89CBLK 350CI 390HP

https://atkhp.com/product/atk-hp89cbl...

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
• Valve Covers: Cast aluminum powder coated black “Chevrolet: embossed with match PCV valve & push in breather
• Flexplate/Flywheel: Externally Balanced – Pioneer #FRA-159
• Air Cleaner: 14”x 3” Super Flow air cleaner system with washable filter (drop base lower)
• Balancer: Internally Balanced – PowerBond #PB1046-N
• 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 680CFM Vacuum secondary’s electric choke #HR-680
• Fuel Pump: Holley mechanical 110GPH #12-327-11
• Fuel Line: Dual inlet AN Stainless Hose from pump to carb
• Spark Plugs: Autolite #3923
• Spark Plug Wires: 8mm