Features

• Material: High-density 40,000 psi cast iron
• Deck Height: 9.500 in. 
• Deck Thickness: .600 in. minimum
• Cam Bearings: Stock (can be bored to 60mm)
• Lifter Bores: Cross-feed between pairs to maintain pressure
• Bore: 4.120 in. (hone to 4.125 in.)
• Bore Spacing: 4.380 in.
• Cylinder Head Attachment: 2 extra head bolts per cylinder allow for 6 head bolts (not required)
• Maximum Bore: 4.200 in. 
• Water Jackets: Expanded for better cooling
• Lubrication: Low restriction priority main oiling system
• Filtration: Integral mount spin-on filter
• Oil Pan Rails: Stock Ford
• Crank Clearance: Can use up to 4.250 in. stroke crank
• Main Caps: 4-bolt splayed nodular iron (ARP 7/16 in. fasteners)
• Oil System: Has .500 in. feed; bosses for dry sump
• 1/2 in. longer cylinder barrels for increased piston support with stroker crankshafts
• Increased front web and center web thickness 
• Includes freeze plugs, cam plug, dowel pins, and pipe plugs