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World Products has applied the technology of the highly-successful Motown Lite small block to the big block Chevy. Intended for street and Sportsman competition, Merlin-X blocks were designed for 100% compatibility with Chevrolet Mark IV components. Reinforcing ribs on the sides improve overall stability and facilitate cooling.
SPECIFICATIONS
Material: 357-T6 aluminum (strongest available)
Deck Height: 9.800" (standard) or 10.200" (tall)
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: 4.490" (hone to 4.500")
Maximum Recommended Bore: 4.600"
Cylinder Wall Thickness: .115" @ 4.500" bore, .065" @ 4.600" bore
Water Jackets: Expanded for better cooling
Lubrication: Priority main oiling system
Oil System Features:Integral boss for front feed, boss for rear scavengeRear main cap has provisions for wet sump pumpDrilled for dry sump valley scavenge linesCrossfeed 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 standard deck, 4.750" for tall deck (using H-beam rods, sleeves may require notching)
Main Caps: Splayed billet steel
Mounts: OE starter and oil filter mounts
Motor Mounts: Front and side
Cylinder Head Holes: Blind tapped to prevent leaks
Weight: Approximately 140 lbs with sleeves
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