5.3L L83 LT1-LT4 Turbo Short Block (New) $7,199 - The LT1/LT4 376ci competition Boost Ready short block uses a new GM LT1/LT4 block with 4.070″ bore to produce the 376CI. This short block provides a strong foundation for Boosted engines making up to 900hp and can be customized to meet your needs. 5.3L L83 LT1-LT4 Turbo Short Block (New) quantity Add to cart Categories: LT1-LT4 Engines, LT1-LT4 Short Blocks ENGINE SPECIFICATIONS Block: 5.3L L83 Block Honed with Torque Plates Bore Size 3.790″ Zero Decked Line Honed with ARP Main Studs Blueprinted Oil Clearances All New GM Block Plugs Installed New Durabond Cam Bearings Installed Pistons: Wiseco 2618 Boost Ready Forged Pistons with Armor Glide skirt coating Rings: Wiseco GFX Stainless Steel Bearings: King H-Series Main and Rod Bearings Crank: GM Factory Forged Steel Stroke 3.622” Wet Sump Internally Balanced Front and Rear Rods: Callies Comp Star 4340 Forged Steel H-Beam 6.125” Length ARP 2000 Rod Bolts