ATK HPE427B Dart LS Next Boost 427CI 1500HP Rated Long Block

Long Block: atkhp.com/prod...
Engine Specifications:
• HP: 650 (Naturally Aspirated)
• TQ: 590 (Naturally Aspirated)
• Block: Dart SHP LS Next Cast Iron
• Bore/Stroke: 4.125″ x 4.000″
• Displacement (cu.in): 427
• Crankshaft: Dart Billet 4.000″ Stroke Internally Balanced 58 Tooth 6 Bolt
• Rods: Manley H Tuff H Beams 4340 Forged 6.125″ ARP 2000 Bolts
• Pistons: JE Ultra Dished 2618 Forged with Thermal Coating, Lateral Gas Ports, .200″ Pin
• Compression Ratio: 10.2:1
• Rings: JE Pro Seal with Carbon Steel Top Ring
• Camshaft: Hyd. roller
• Cam Specs: Custom ATK Grind
• Cylinder Heads: Frankenstein M311 72cc/273cc with Black Nitride Stainless Steel Severe Duty Valves, Titanium Retainers and PAC .700″ lift Springs
• Head Fasteners: ARP Head Studs
• Head Gaskets: Cometic MLX
• Lifters: Johnson 2116LSR Link Bar
• Rocker Arms: OE powdered metal 1.7 ratio with Trunnion Upgrade
• Oil Pump: Melling 10295 Standard Volume High Pressure