ATK HP55M Chevy 383 Stroker Mid Dress Engine 500HP

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: 8mmEngine Info: Oil: Conventional / Non Synthetic 10W30 Oil Filter: Wix or K and 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.

Highlights

• Oil: Conventional / Non Synthetic 10W30
• Oil Filter: Wix or K&N per application
• Timing: 34-36 Degrees

Specifications

• Cylinder Head Material: Aluminum
• Harmonic Balancer Included: Yes
• Flexplate Included: No
• Flywheel Included: No
• MFG. Part #: HP55M
• GTIN Code: 00653517259777
• Sold in Quantity: Each
• Brand: ATK Engines

Emissions Notice

Emissions warning: this part is for vehicle engine changes, not direct oem engine replacements. In California, engine changes are legal when done in compliance with California bureau of automotive repairs (bar) engine change policy. For assistance, call bar referee at: (800) 622-7733. And see https://bar.Ca.Gov/consumer/smog_check_program/engine_changes. All customers must comply with federal epa mobile source enforcement memorandum no. 1a (and addendum) and all applicable state regulations when conducting engine changes. Improper installation and/or use of this part in California may subject the installer and/or owner to a $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and laws of all states for use of this engine change part on makes or models of vehicles that render them noncompliant with applicable state and/or federal emission laws with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine