Join for free - click here Find New Racing Products and Technologies. The Merlin IV is available with a 2.120″ journal for standard BBC cam and standard .842″ lifter bores, or with a 2.283″ journal for a 55mm Babbitt cam and .904″ lifter bores. Chevrolet Big Block MKIV w/Merlin heads, 8 long exhaust studs, 12pt Head Stud Kit. New Merlin IV features include upgraded 35,000 psi iron alloy with added material in the main webs, cam tunnel and cylinder walls for increased strength. Cam, Std. Cast and machined in ISO 9000 certified facilities, the Merlin IV is 100 percent American-made and subject to stringent quality assurance procedures to ensure superior quality and performance. … Your email address will not be published. The oil filter adapter bolts to Mark IV blocks with two 5/16-18 bolts. The Merlin IV block is designed with four-bolt mains for all five of the nodular iron main caps. or Best Offer. Merlin IV Big Block Chevy Cast Iron Engine Bare Block, Please select the checkbox to SignUp for text alerts, Line Lock / Roll Control Kits & Components, Thermostat Housings, Filler Necks & Water Restrictors, Exhaust Kits - Catalytic Converter/Axle Back, Fasteners and Accessory Mounting Brackets, Throttle/Carburetor Linkage, Choke Kits & Components, Wiring, Wiring Harnesses, Switches, Connectors, Breakers & Relays, Axles, Axle Housings, Housing Braces & Components, Tire Gauges, Pyrometers, and Stagger Tape, Air Valve Stems, Stem Caps & Wheel Weights, Tire Pressure Gauges, Tire Durometer & TPMS Sensors, Golf Cart/ATV Wheels, Tires and Accessories, Decals, Pins, Patches, Signs, Banners, Magnets & Lanyards, Car & Truck Programmers, Modules and Chips, Lifter Valley Oil Control Trays, Baffles & Screen Kits, Oil Filter Adapters & Remote Oil Filter Mounts, Oil Pan Drain Plugs, Oil Change Systems, & Engine Magnets, Oil Pan Windage Trays, Baffles & Crankshaft Scraper, Oil Restrictors & Lifter Valley Breather Tubes, Steering, Chassis & Suspension Restoration, Transmissions & Components for Classic Cars, Shifter Replacement, Service & Mounting Components, Chassis, Roll Cage, Frame Rail, Subframe & Front Suspension Kits, Panhard Rods, Track Rods & Rear Axle Housing Locater Rods, Storage Shelves, Cabinets, and Misc. New features include thicker main webs for increased strength and thicker cylinder walls which are nominally.310 in. We recommend oils designated SM/SL/SJ, 15W-40 or 20W-50. Watch; 085500 BMP MERLIN X BBC 9.800/4.240 ROUGH BORE STD. World Products’ Merlin IV engine block is the latest evolution of its aftermarket big-block Chevy block. Along with the rear main, the Gen V modified the head … Merlin IV 9.8 block Ohio Crankshaft 4340 4.250 crank Ohio Crankshaft H6385 rods w/ARP 2000 bolts SRP dome pistons 13.0 compression Brodix BBCXtra 345 heads Merlin X intake manifold Erson/COMP solid roller cam and lifters Race rings and bearings Canton oil pan Harland Sharp rockers rocker stud girdle Ohio Crankshaft billet valve covers Several Options Available! Fully chamfered on the cnc, then deburred on bottom of cylinders. New merlin IV bbc block. The original MK IV blocks used the traditional two-piece rear main seal technique from 1965 continuously until the Gen V engines appeared in 1991 that moved to the one-piece rear seal configuration. The Merlin IV is available with a 2.120-inch journal for standard BBC cam and standard .842″ lifter bores, or with a 2.283-inch journal for a 55mm Babbitt cam and .904-inch lifter bores. It’s got a 5000 psi stronger cast iron in the new Merlin IV block. Buy It Now. The early Mk-IV BB "Bow-Ties" (without the inner head bolt holes) weighs 215#. The Merlin IV also has an increased volume priority main oiling system with a front oil feed for dry sump systems and front oil cross over with restrictor provisions to provide racing engines with oil where they need it the most. 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. 25,000+ Racing Businesses at your fingertips. Cam Bearings: 2.120″ journal bore, Durabond# GMP12 or GMP12LT, Lifter Bores: Indexed (stock .8437″ bore) requires +.300″ tall lifters, Cylinder Wall Thickness: .310″ at 4.600″ bore, Water Jackets: Expanded for better cooling, Filtration: Integral mount for spin-on filter. World Products has redesigned the famed Merlin Big Block Chevy casting, incorporating numerous improvements and new features, designated the Merlin IV. ALIGN HONE SQUARE DECK BORE... Posted Yesterday, 3:04 AM Early Access. Stock bolts are 13⁄8 inches long, but most aftermarket blocks require shorter 1¼-inch-long bolts. $9,500.00 + shipping. These Merlin III blocks incorporate reinforced … Muncie , IN . Save my name, email, and website in this browser for the next time I comment. normally aspirated or the block is being used in a nitrous or blower application, it is HIGHLY RECOMMENDED to use the Merlin III block with the billet, splayed main caps.. Block … BBC CHEVY 572 TURN KEY ENGINE, DART BLOCK 740 hp-SERPENTINE. normally aspirated or the block is being used in a nitrous or blower application, it is Highly Recommended to use the Merlin II Race block with the billet, splayed main caps. WORLD PRODUCTS BBC Merlin IV Cast Iron Engine Block Chevy Big Block, 10.200″Deck, 4.245″ Bore. Lifters. Seller 100% positive. The oil system is revised with enlarged passages and cross overs in front, uses simple pipe plug type restrictors, .500″ oil gallery is relocated so 55mm cam does not require lifter bushings.

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