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Built for power, the ATK HP89M Chevy 350CI Engine 390HP Mid Dress is a perfect choice for muscle cars and trucks. It is hand assembled and balanced by experts to deliver a reliable and consistent performance for years to come. It delivers 390 horsepower and 420 ft.lb torque that is sure to make a lasting impression on the streets.
Engine Specifications:
Horsepower: 390
Torque: 420 lbs./ft.
Block: OE roller block 4 bolt main 1pc seal 1996-2000
Bore/Stroke: 4.040 x 3.480
Displacement: 350 C.I.D.
Crankshaft: OE Reground external balance rear of the crank/internal balance front of the crank
Connecting Rods: OE Powder Metal 5.700" Stock Bolts
Camshaft Bearings: Installed & Clocked to OEM Position
Cylinder Heads: ATK High Performance aluminum with 2.020 in. /1.600 ex. valves
Freeze Plugs: Brass Installed & Sealed
Rocker Arms: Billet Aluminum Full Roller 1.6 Ratio
Oil Galley Plugs: Installed & Sealed
Oil Pan: Rear sump 5qt (not for Chevelles with steering behind crossmember, some corvettes and 62-67 chevy II’s)
Weight: 375
ATK specializes in muscle. With the highest quality internal parts and Dyno Proven combinations of every engine built, ATK is able to add the most bang for your buck and back it up with an industry leading warranty.