motown small block race merlin-x blocks economical new aluminum big block chevrolet block technical specifications material 357-t6 aluminum strongest available deck height 9.800 or 10.200 tall deck deck thickness .600 minimum cam bearings standard chevrolet big block set main bearings standard chevrolet camshaft location stock lifter bores indexed stock .843 bore bore 4.240 hone to 4.250 or 4.490 hone to 4.500 maximum bore 4.530 recommended cylinder wall thickness 250 4.500 bore water jackets expanded for better cooling lubrication priority main oiling system oil system features integral boss for front feed boss for rear scavenge rear main cap has provisions for wet sump pump drilled for dry sump valley scavenge lines cross-feed lines between left and right lifter oil galleys filtration integral mount for spin-on filter oil pan rails solid stock width can be clearanced for strokers crank clearance 4.375 for short deck 4.750 for tall deck block using h-beam steel rods
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merlin iii motown small block street world has taken the knowledge of over 15 years experience manufacturing merlin blocks for competition and developed this affordable cnc-machined version that s perfect for marine e.t bracket racing and street use the merlin iii incorporates such important features of the race block as reinforced bulkheads and main webs thicker decks and a priority main oiling system plus essentials for street use like using the stock chevy oil pan pattern oem 2.750 mains and 100 compatibility with mark iv components it has provisions for a spin-on oil filter while the indexed lifter bores assure optimum reliability users now can choose between nodular iron 4-bolt mains or splayed steel billet caps it s important to note that world s merlin iii blocks are far superior to oem parts in terms of quality each block is precision cnc-machined using only two fixturing operations compare this to factory-built blocks which are done on a production line and passed from mach
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motown small block race merlin iii can be safely bored to 4.625 indexed lifter bores intake valley head bolt bosses blind tapped head bolt holes popular priced iron chevy big block available with 9.800 or 10.200 deck height 10.200 deck height blocks accept 4.750 stroke cranks h-beam steel rods without clearancing 4.375 stroke on 9.800 deck solid oil height blocks pan rails nodular iron 4-bolt main caps or splayed billet steel compatible with all mark iv components reinforced bulkheads for improved strength priority main oiling system for optimum reliability enlarged water jackets provide superior cooling thick walls can be bored 4.625 fully race-prepped blocks for your convenience merlin iii blocks can be ordered fully raceprepped from the factory operations include plate-honing cylinders to the bore sizes listed below thoroughly washing the block installing cam bearings and freeze plugs and protecting all machined surfaces with oil ready for assembly beefy bottom end has sol
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motown small block race merlin pro only a few left in inventory hurry because once they re gone there won t be any more made ever the beefy bottom-end of the merlin pro block features splayed billet steel main caps 1/2 with dowels block is available with dual pattern or drce oil pan rails technical specifications material high density cast iron deck heights 10.200 deck thickness .600 minimum cam bearings standard gm main bearings standard chevrolet 2.750 rear main seal 2-piece chevrolet mark iv camshaft location stock or raised 400 lifter bores indexed stock .843 bore bore 4.490 hone to 4.500 maximum bore 4.625 cylinder wall thickness nominal .200 4.600 bore water jackets expanded for better cooling lubrication priority main oiling system filtration integral mount for spin-on filter oil pan rails dual pattern oem chevy or drce crank clearance up to 4.375 crank w/h-beam standard can be clearanced for 4.500 raised cam block can go up to 5.850 stroke main caps splayed b
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