This LS Power Adder Short Block comes standard with a DART SHP Iron engine block. This block utilizes a 6 bolt cylinder head pattern for extra clamping force to help secure the cylinder heads and head gaskets. It also has billet steel main caps with splayed outer bolts. This greatly increases the strength of the engine block and tightly secures the crankshaft. Please call for additional options or upgrades. Specs:Block: DART SHP Iron, 6 Bolt Head Pattern, Billet Steel Main Caps, 4.125" BoreCr...

This LS Power Adder Long Block comes standard with a DART SHP Iron engine block. This block utilizes a 6 bolt cylinder head pattern for extra clamping force to help secure the cylinder heads and head gaskets. It also has billet steel main caps with splayed outer bolts. This greatly increases the strength of the engine block and tightly secures the crankshaft. Please call for additional options or upgrades. Specs:Block: DART SHP Iron, 6 Bolt Head Pattern, Billet Steel Main Caps, 4.125" BoreCra...

416" LS Short Block Specs:Block: New GM LS3 Aluminum, 4.065" Bore, Gen IV Crankshaft: Smeding 4340 Forged Steel, Internal Balance, 4.000" Stroke, 58x Rods: Smeding 300m Forged Steel I-Beam w/ 8740 Bolts, 6.125" Length700hp Pistons: 4032 Forged Pistons, 3.3cc Flat Top, Coated Skirts1,000hp Pistons: 2618 Forged Pistons, Optional Volume, Coated Skirts & Tops Rings: Plasma-Moly Top, Low Friction Oil, 1.5/1.5/3.0 Warranty: 3 Year, Unlimited Miles Cam Specs:530hp: .620/.605 Lift, 225/238 Durati...

416" LS Long Block Specs:Block: New GM LS3 Aluminum, 4.065" Bore, Gen IVCrankshaft: Smeding 4340 Forged Steel, Internal Balance, 4.000" Stroke, 58xRods: Smeding 300m Forged Steel I-Beam w/ 8740 Bolts, 6.125" Length700hp Pistons: 4032 Forged Pistons, 3.3cc Flat Top, Coated Skirts1,000hp Pistons: 2618 Forged Pistons, Optional Volume, Coated Skirts & TopsRings: Plasma-Moly Top, Low Friction Oil, 1.5/1.5/3.0Camshaft: Billet Steel Hydraulic Roller - Two OptionsLifters: Gaterman Link-Bar Hydrau...