Dart SHP GM LS Next GEN 3 High Performance bare blocks full skirt designed, high performance and heavy duty applications. These blocks are an ideal starting point for hot rodders, drag racers, circle track competitors, off-roaders and high performance marine enthusiasts. Block material Class 30 grey iron. Bores unfinished to 4.115″/Max bore diameter 4.185″/Max stroke 4.125″/Deck height 9.240″/Billet steel main caps/Standard cam locations/1-piece rear main seal/Block weight 227lbs/Special order process time 2-4 business weeks. (Bank wire transfer or check only.) • Dart priority main oiling system with provisions for stock oil filter mounting. • Accepts factory and aftermarket oil pans. • Siamesed cylinder bores with thick walls. • Cylinder barrels extended .375” at the bottom of the bores. • Thick decks ensure reliable head gasket seal. • Blind head bolt holes available in 7/16” or 1/2” upgrade option. • 6-bolt per cylinder capability. • Scalloped water jackets increase flow around cylinders for better cooling. • Clearanced up to 4.100” stroke w/ steel rods. • Clearanced for center counterweighted crankshafts. • Splayed outer bolts on middle main bearing caps. • Provisions for LSX roller lifters and cam. • Uses OE front and rear covers. • All OE bolt holes for starter, water pump, etc. Please e-mail with questions. (Bank wire transfer or certified check.)