ATK Engines High Performance Engine Block (MPN: HP291P)

Engineered for maximum performance and durability in Chevrolet small block V-8 applications.

The ATK Engines High Performance Engine Block is designed specifically for Chevrolet small block V-8 applications, offering a robust solution for automotive enthusiasts. This engine block features a seasoned OE 4 bolt main design with a 1 piece seal, ensuring long-term durability and reliability. With a compression ratio of 9.1:1, it delivers an impressive output of 325 horsepower and 375 foot pounds of torque, making it suitable for street performance and various automotive applications.

Constructed from high-quality cast iron, the engine block includes essential components such as hypereutectic pistons, moly piston rings, and a hydraulic flat tappet camshaft. The externally balanced design, along with the 4.040 inch bore and 3.480 inch stroke, contributes to its efficient performance. Additionally, the engine block is equipped with a double roller timing chain and stamped steel rocker arms, enhancing its operational efficiency.

ATK Engines has a legacy of over 80 years in engine building, providing products that are utilized in a wide range of vehicles from classics to race cars. This engine block is a testament to their commitment to quality, featuring name brand components that ensure optimal performance. Whether for daily driving or high-performance applications, this engine block meets the demands of automotive enthusiasts.

Features

• Provides Maximum Performance And Long-Term Durability
• ATK High Performance Engines Are Based On Dyno Proven Combinations Built With Name Brand Parts
• Features Hypereutectic Pistons And Moly Rings
• Features Hydraulic Flat Tappet Camshaft
• Features Double Roller Timing Chain
• Features Stamped Steel Rocker Arms
• Features Cast Iron Cylinder Head
• Features Melling High Volume Oil Pump

Specifications

• Manufacturer: ATK Performance Eng.
• Manufacturer Part Number: HP291P
• Engine Compatibility: Chevy Small Block V8; 5.7L/350 Cubic Inch 350 Cubic Inch
• Recommended Use: Street Performance
• Horse Power Output: 325 Horsepower
• Torque Output: 375 Feet Pound
• Bore (IN): 4.04 Inch
• Stroke (IN): 3.48 Inch
• Compression Ratio: 9.1:1
• Color: Black
• Cylinder Block Material: Cast Iron
• Cylinder Head Material: Cast Iron
• Balanced Type: Externally Balanced
• Includes Camshaft: Yes
• Includes Fuel Pump: No
• Includes Oil Pan: Yes
• Includes Water Pump: No
• Includes Intake Manifold: No
• Includes Carburetor: No
• Includes Air Cleaner: No
• Includes Distributor: No
• Marine: No

Compatibility / Fit

• 1977-1981 Buick Century
• 1978-1978 Buick LeSabre
• 1977-1980 Buick Regal
• 1977-1979 Buick Skylark
• 1966-1974 Checker Aerobus
• 1969-1970 Checker Deluxe
• 1965-1970 Checker Marathon
• 1972-1982 Checker Marathon
• 1969-1974 Checker Taxicab
• 1964-1975 Chevrolet Bel Air
• 1964-1972 Chevrolet Biscayne
• 1969-1974 Chevrolet Blazer
• 1969-1972 Chevrolet Brookwood
• 1975-1986 Chevrolet C10
• 1964-1974 Chevrolet C10 Pickup
• 1967-1985 Chevrolet C10 Suburban
• 1975-1985 Chevrolet C20
• 1964-1974 Chevrolet C20 Pickup
• 1967-1967 Chevrolet C20 Suburban
• 1967-1974 Chevrolet Camaro
• 1976-1985 Chevrolet Camaro
• 1966-1974 Chevrolet Caprice
• 1977-1985 Chevrolet Caprice
• 1964-1967 Chevrolet Chevelle
• 1969-1973 Chevrolet Chevelle
• 1964-1968 Chevrolet Corvette
• 1972-1972 Chevrolet Corvette
• 1974-1981 Chevrolet Corvette
• 1964-1971 Chevrolet El Camino
• 1974-1985 Chevrolet El Camino
• 1975-1985 Chevrolet G10
• 1968-1974 Chevrolet G10 Van
• 1975-1985 Chevrolet G20
• 1967-1974 Chevrolet G20 Van
• 1964-1985 Chevrolet Impala
• 1975-1985 Chevrolet K10
• 1964-1974 Chevrolet K10 Pickup
• 1967-1985 Chevrolet K10 Suburban
• 1975-1985 Chevrolet K20
• 1964-1974 Chevrolet K20 Pickup
• 1967-1985 Chevrolet K20 Suburban
• 1975-1985 Chevrolet K5 Blazer
• 1969-1972 Chevrolet Kingswood
• 1978-1983 Chevrolet Malibu
• 1972-1985 Chevrolet Monte Carlo
• 1975-1979 Chevrolet Monza
• 1969-1979 Chevrolet Nova
• 1975-1975 Chevrolet P10
• 1977-1979 Chevrolet P10
• 1973-1973 Chevrolet P10 Van
• 1975-1985 Chevrolet P20
• 1970-1974 Chevrolet P20 Van
• 1975-1985 Chevrolet P30
• 1970-1974 Chevrolet P30 Van
• 1964-1966 Chevrolet Suburban
• 1969-1972 Chevrolet Townsman
• 1975-1978 GMC C15
• 1975-1978 GMC C15 Suburban
• 1967-1974 GMC C15/C1500 Pickup
• 1968-1974 GMC C15/C1500 Suburban
• 1979-1985 GMC C1500
• 1975-1978 GMC C25
• 1975-1978 GMC C25 Suburban
• 1967-1974 GMC C25/C2500 Pickup
• 1968-1974 GMC C25/C2500 Suburban
• 1979-1985 GMC C2500
• 1978-1985 GMC Caballero
• 1975-1978 GMC G15
• 1967-1974 GMC G15/G1500 Van
• 1979-1985 GMC G1500
• 1975-1978 GMC G25
• 1967-1974 GMC G25/G2500 Van
• 1979-1985 GMC G2500
• 1970-1974 GMC G35/G3500 Van
• 1979-1985 GMC G3500
• 1970-1974 GMC Jimmy
• 1977-1985 GMC Jimmy
• 1975-1978 GMC K15
• 1975-1978 GMC K15 Suburban
• 1967-1974 GMC K15/K1500 Pickup
• 1967-1974 GMC K15/K1500 Suburban
• 1979-1985 GMC K1500
• 1979-1985 GMC K1500 Suburban
• 1975-1978 GMC K25
• 1975-1978 GMC K25 Suburban
• 1967-1974 GMC K25/K2500 Pickup
• 1968-1974 GMC K25/K2500 Suburban
• 1979-1985 GMC K2500
• 1979-1985 GMC K2500 Suburban
• 1967-1967 GMC P15/P1500 Van
• 1970-1973 GMC P15/P1500 Van
• 1975-1978 GMC P25
• 1967-1974 GMC P25/P2500 Van
• 1979-1985 GMC P2500
• 1971-1971 GMC Sprint
• 1974-1974 GMC Sprint
• 1976-1977 GMC Sprint
• 1964-1965 GMC Suburban
• 1977-1977 Oldsmobile Custom Cruiser
• 1978-1980 Oldsmobile Cutlass
• 1980-1980 Oldsmobile Cutlass Cruiser
• 1982-1982 Oldsmobile Cutlass Cruiser
• 1978-1980 Oldsmobile Cutlass Salon
• 1978-1980 Oldsmobile Cutlass Supreme
• 1977-1979 Oldsmobile Omega
• 1977-1979 Oldsmobile Starfire
• 1980-1981 Pontiac Bonneville
• 1983-1985 Pontiac Bonneville
• 1980-1981 Pontiac Catalina
• 1977-1985 Pontiac Firebird
• 1978-1980 Pontiac Grand Am
• 1977-1981 Pontiac Grand LeMans
• 1978-1981 Pontiac Grand Prix
• 1983-1985 Pontiac Grand Prix
• 1977-1981 Pontiac LeMans
• 1983-1986 Pontiac Parisienne
• 1978-1979 Pontiac Sunbird
• 1977-1977 Pontiac Ventura

Technical Documents

• ATK_Warranty.pdf
• HP291P.pdf