ATK Engines SP15NB Chevy 377 Stroker Short Block, 18cc Dish

Engine Specifications: Block: 100% New American Made Block 1pc Seal with upgraded heavy duty 2 bolt main caps (this is not your typical GM 2 bolt main block) Bore/Stroke: 4.000” x 3.750” Displacement: 377CI Crankshaft: Scat nodular iron external balance rear of the crank/internal balance front of the crank Rods: Scat 4340 forged I beam with ARP 8740 bolts Pistons: Hypereutectic -18cc dished Compression Ratios: 58cc = 10.3:1 / 64cc = 9.7:1 / 70cc=9.1:1 (can vary due to deck height/gasket thickness) Rings: Plasmamoly Camshaft Bearings: Dura-Bond, installed and clocked to OEM position Freeze Plugs: Brass, installed and sealed Oil Galley Plugs: Installed and sealed Flexplate/Flywheel: External balance 168 tooth (with Scat kit) Recommended Components: Balancer: Internal balance Head Gasket: .038” or per applicationEngine Info: Oil: 10W30 Non synthetic for first 3000 miles Oil Filter: Wix or K&N per application Disclaimer: The recommended components listed are ATK’s recommendations of parts to be used, applications vary and your build may need something different. Contact ATK for a recommendation if you’re not certain about a component to use. 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