World Products used their 15-plus years of experience manufacturing Merlin blocks for competition to develop these affordable, CNC-machined versions that are perfect for marine, ET bracket racing, and street use. These Merlin III blocks incorporate reinforced bulkheads and main webs, thicker decks, and a priority main oiling system. Specifications are as follows: * Made from high-density cast iron * 9.800 in. or 10.200 in. deck heights with .600 in. minimum thickness * Dry sump valley scavenge lines drilled * Clearanced for 4.375 in. stroker crankshaft (H-beam steel rods for 9.800 in. deck), or 4.750 in. clearance for 10.200 in. deck * Integral mount for spin-on oil filter * Dry sump systems can feed from front or rear of block * Can be bored to 4.625 in. maximum * Water jackets expanded for better cooling * Standard Chevy cam location and cam bearings * Priority main oiling system for maximum reliability * Solid pan rails with stock spacing * OEM starter, fuel pump, and engine mounts (dual) * Blind tapped head bolt holes for extra integrity * 100 percent compatible with OEM parts * Indexed lifter bores * Integral boss for front-feed oiling systems * Compatible with all Chevy Mark IV components * Stepped oiling (.584 in.-.500 in.-.437 in.) * Extra head bolt bosses in valley to accommodate special racing heads * Oil drainback in valley lubricates distributor gear * Blind holes drilled into valley for screen (no risk of cam binding) * Manufactured to QS-9000 specs on two CNC centers

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