World Products BB-Chevy Merlin III Cast Iron Blocks
Product images may differ from actual product appearance.
Ideal for street, ET bracket racing, and marine applications, World Products applied almost 15 years of Merlin knowledge to develop these blocks, offered bare or race-prepped. The race version features a thoroughly-washed block, plate-honed cylinders to the bore size, and installed cam bearings and freeze plugs. Merlin III blocks have reinforced bulkheads and main webs, thicker decks, 100% compatibility with Mark IV components, and indexed lifter bores for optimum reliabilty. Their quality is superior to OE parts, especially because each block is CNC-machined to QS-9000 specs using only two fixturing operations (thus avoiding tolerance stacking common to factory blocks from assembly lines).
SPECIFICATIONS
Material: Cast iron
Deck Height: 9.800" or 10.200"
Deck Thickness: .600" minimum
Cam Bearings: Standard Chevy
Main Bearings: Standard Chevy
Camshaft Location: Stock
Lifter Bores: Indexed
Bore: 4.240" or 4.490" (bare) and 4.250" or 4.500" (race)
Maximum Recommended Bore: 4.625"
Cylinder Wall Thickness: .250" @ 4.600" bore
Water Jackets: Expanded for better cooling
Lubrication: Priority main oiling system
Filtration: Integral mount for spin-on filter
Oil Pan Rails: Solid stock width (can be clearanced for Strokers)
Oil System Features:
Stepped oiling
Dry sump systems can feed from front or rear
Oil drainback in valley lubricates distributor gear
Drilled for dry sump valley scavenge lines
Extra head bolt bosses in valley to accommodate special racing heads
Blind holes drilled into valley for screen
Crank Clearance: 4.375" for 9.800" deck or 4.750" for 10.200" deck
Main Caps: 4-bolt nodular iron or splayed billet steel
Rear Main: 2-piece rear main seal
Fuel Pump Mount: OE mount
Starter: OE mount
Motor Mounts: Front and side
Cylinder Head Holes: Blind tapped to prevent leaks
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$119.00
