* Rear main cap uses standard oil pump and two-piece seal, no adapter required * Lifter valley head stud bosses prevent blown head gaskets * Oil filter pad is drilled and tapped for an external oil pump * True priority main oil system lubricates the main bearings before the lifters * 4-bolt ductile iron main caps have splayed outer bolts for extra strength * Scalloped outer water jacket walls improve coolant flow around the cylinder barrels to equalize temperatures Modifications for Gen IV style are also available bore sizes with Siamesed extra thick cylinder walls to resist cracking and improve ring seal (minimum. deck heights available for Stroker engines Dart engineered the Big M to be the strongest, most reliable, and easiest to build big blocks on the market. The foundation for a better big block build begins with Dart Big M Sportsman Big Block Chevy cast iron bare blocks. * LSX-style lifter bosses and dog bone provision are providedĭart Big M Sportsman Big Block Chevy Cast Iron Bare Blocks * Expanded water jacket on #1 cylinder for additional cooling capacity * External oil filter (must be used with stock or aftermarket oil pumps) * Pro-Stock/Pro-Mod big block style stepped main oil galley * Revised low-restriction priority main oiling system * Provision for oil restrictors in the lifter valley * Blind head bolt holes don't go through into the water jacket * Extended cylinder barrels at the bottom to provide greater piston support for all combinations * Full main webbing for maximum bottom-end strength * Conventional style 4-bolt steel main caps Highlight features of the LS Next cast iron bare blocks include: Dart LS Next blocks are back and better than ever! They're available in multiple engine block styles, including stock/OEM standard deck and aftermarket. The blocks are designed to rectify some of the former LS's more noticeable shortcomings on the bottom end-while still supporting high-flow and efficient cylinder heads developed for Gen III and IV platforms. * Uses stocked stamped steel or plastic timing coverĭart LS Next cast iron bare blocks integrate the robust heritage of a traditional Chevy small block with the performance potential of the late model LS engine architecture. * Uses 1981 to 1985 stock style oil pan and passenger side dipstick * All OE bolt holes starter, clutch ball, etc. * Provisions for OE stock roller lifters and cams * Splayed outer bolts on middle main bearing caps * Scalloped water jacket walls for improved flow around cylinders for better cooling * Blind head bolt holes (don't go through water jacket) * Extra thick decks to ensure reliable head gasket seal * Siamese cylinder bores with extra-thick walls Key features of SHP small block Chevy bare blocks are: These SPH blocks are an ideal starting point for hot rodders, drag racers, circle track competitors, off-roaders and high performance marine enthusiasts. Dart SHP Special High Performance Small Block Chevy Cast Iron Bare Blocksĭart SHP Special High Performance small block Chevy cast iron bare blocks are designed for high performance and heavy duty applications.
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