Up for sale is a 427ci LS street/strip engine capable of producing 600+ horsepower naturally aspirated while being built strong enough to handle boost or nitrous. It starts with a rare heavy-duty GM aluminum 5.3L block featuring GM Performance steel main caps, upgraded with Darton sleeves and a 4.125” bore. The rotating assembly includes a new Lunati 4340 forged 4.000” stroke crankshaft, Lunati H-beam rods, and Wiseco forged pistons. It also features new GM LS7 lifters, a BTR trunnion upgrade, a custom BTR/Full Proof LS7-style hydraulic roller cam with matching spring kit, LS7 MLS head gaskets, and all new ARP-style studs and hardware. The CNC-ported LS7 cylinder heads were professionally prepared by Thitek Performance, and the engine is topped with a FAST LS7 intake manifold. This engine has approximately 11:1 compression, runs on pump gas in naturally aspirated form, and currently uses a new C6 Corvette wet-sump oil pan. A brand-new LS swap oil pan can also be included. Asking $11,000. Located in Sandy but shipping can be arranged at the buyer’s expense. Please PM if interested.
