Quick Overview
The Merlin III Block is a perfect choice for high performance marine applications. It incorporates important features of the Pro Race block such as reinforced bulkheads and main webs, thicker decks, and a priority main oiling system plus essentials for marine use such as utilizing the stock Chevy oil pan pattern, OEM 2.750" mains and 100% compatibility with Mark IV Bow Tie components. The nodular iron 4-bolt mains provide the necessary support for high RPM operation while maintaining excellent bearing wear. Indexed lifter bores assure optimum reliability. World Products blocks are manufactured to QS-9000 specifications."
TECHNICAL SPECS Material: High Density Cast Iron
Deck Height: Standard 9.800"
Deck Thickness: .600" minimum
Cam Bearings: Standard Chevrolet
Main Bearings: Standard Chevrolet
Camshaft Location: Stock
Lifter Bores: Indexed (stock .8437" bore)
Bore: 4.240 (hone to 4.250") or 4.490 (hone to 4.500")
Maximum Bore: 4.625"
Cylinder Wall Thickness: .250" at 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)
Crank Clearance: 4.375" stroke
Main Caps: 4-bolts splayed, nodular iron or billet steel
Fuel Pump: OEM mount
Starter: OEM mount
Motor Mounts: Dual (front and side)
Cylinder Head Holes: Blind tapped to prevent leaks
Weight: Approximately 270 lbs.
Compatible with all Mark IV components All Merlin III Blocks need finish machine work to complete.
Remember: TCM offers complete machine service and block preparation
Call For Price and Technical Question 250-381-5900