ATK HP55M Chevy 383 Stroker Mid Dress Engine 500HP




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Engine Specifications:
• HP: 500
• TQ: 505
• Block: OE roller block 4 bolt main 1pc seal 1996-2000
• Bore/Stroke: 4.040 x 3.750
• Displacement: 383
• Crankshaft: Scat 4340 forged external balance rear of crank/internal balance front of the crank
• Rods: Scat 4340 forged H beam with ARP 8740 bolts
• Pistons: Forged 10.2:1` compression
• Rings: Moly
• Camshaft: Hyd. roller
• Cam Specs: 237/245 @50 .597in/.597ex 112LSA
• Timing Chain: Double roller
• Cylinder Heads: Dart SHP American Made aluminum 72cc/200cc 2.02/1.60
• Rocker Arms: Billet aluminum 1.6 roller rockers
• Oil Pan: Rear sump 5qt (not for Chevelles with steering behind crossmember, some corvettes and 62-67 chevy II’s)
• Oil Pump: Melling
• Balancer: PowerBond internal balance 8” #PB1046-N
• Flexplate/Flywheel: Pioneer #FRA-159 external balance 168 tooth (with Scat kit)
• Intake Manifold: Edelbrock performer RPM air gap #7501
• Distributor: Pro billet (Iron gear)
• Water Pump: Weiand action + long pump #9240

Recommended Components:
• Carburetor: Quick Fuel 750CFM mechanical secondary no choke #Q-750
• Fuel Pump: Holley mechanical 110GPH #12-327-11
• Spark Plugs: Autolite #3923
• Spark Plug Wires: 8mm
Engine Info:
• Oil: Conventional / Non Synthetic 10W30
• Oil Filter: Wix or K&N per application
• Timing: 34-36 Degrees
• Spark Plug Gap: .035”
• Firing Order: 18436572
• Octane: 91+
• Stall Converter: 2800+
• Exhaust: 1 ¾ Headers


Disclaimer: The parts listed are ATK’s recommendations of parts to be used to obtain our power figures listed. Power figures can vary based on parts used by the end user. It is the customer’s responsibility to verify components will work in their application. Some modifications to the vehicle may be required using these and or other aftermarket parts. . ATK reserves the right to substitute parts used in engines if necessary.


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