ATK High Performance HP42C BBC 540CI 660HP+

Base Engine: https://atkhp.com/product/atk-hp42-ch...
Mid Dress Engine: https://atkhp.com/product/atk-hp42m-c...
Complete Engine: https://atkhp.com/product/atk-hp42c-c...

Engine Specifications:
• HP: 660
• TQ: 650
• Block: Dart Big M 4 bolt main 2pc seal
• Bore/Stroke: 4.500” x 4.250”
• Displacement: 540
• Crankshaft: Manley 4340 forged internal balance
• Rods: Manley 4340 forged H beam with ARP 8740 bolts
• Pistons: Forged 10.1:1` compression
• Rings: Moly
• Camshaft: Hyd. roller
• Cam Specs: 243/249 @50 .640in/.640ex 112LSA
• Timing Chain: Double roller
• Cylinder Heads: Dart Pro 1 aluminum 121cc/320cc 2.250/1.880
• Rocker Arms: Howards billet aluminum 1.7 roller rockers
• Oil Pan: Moroso 7qt street/strip pan with windage tray
• Oil Pump: Melling high volume
• Balancer: Professional Products internal balance 8” #80004
• Flexplate/Flywheel: Pioneer #FRA-100 internal balance 168 tooth
• Intake Manifold: Edelbrock performer RPM air gap #7562
• Distributor: Pro billet (Iron gear)
• Water Pump: Weiand action + long pump #9242
• Carburetor: Quick Fuel 850CFM mechanical secondary no choke #Q-850
• Fuel Pump: Holley mechanical 130GPH #12-454-13
• Spark Plugs: Autolite #3934
• Spark Plug Wires: 8mm