Overview Brand: ATK High Performance Engines Manufacturer’s Part Number: SP15NB Part Type: Short Block Engines Product Line: ATK High Performance Chevy 377 Stroker Short Blocks Summit Racing Part Number: HPE-SP15NB UPC: 00653517678981 Crate Engine Family: Chevy Small Block Actual Engine Displacement: 6.2L/377 Rear Main Seal Style: 1-piece Crankshaft Material: Nodular iron Piston Material: Hypereutectic aluminum Short Block Piston Style: Dish Connecting Rod Material: Forged 4340 steel Connecting Rod Beam Style: I-beam Engine Block Material: Cast iron Main Bolt Style: 2-bolt Main Journal Type: Chevy 350 Engine Balance: Internal/External Oil Pan Included: No Timing Cover Included: No Harmonic Balancer Included: No Flexplate Included: No Flywheel Included: No Assembled: Yes Remanufactured: No Quantity: Sold individually. ATK High Performance Chevy 377 Stroker Short Blocks Looking to upgrade your old engine using your existing heads? ATK high performance Chevy 377 Stroker short blocks use a 100 percent new American-made cast iron block outfitted with a Scat crank kit. All the hard work is done, you just need to finish it off. These crate engines are available with forged H-beam or I-beam connecting rods; dish top or flat top pistons; forged 4340 steel or nodular iron crankshaft; and other options. Note: Performance short blocks are based on dyno-proven combinations built with name brand parts. Stroker engine built over size of stock stroke. Short block strapped and shipped on wooden pallet crate. Applications Make: CHEVROLET Beginning Year: 1986 Ending Year: 2002 Engine Type: V8 Engine Size: 5.7L/350 Engine Family: Chevy small block Gen I