Features

• Material: High-Density Cast Iron
• Deck Height: 9.800 in.
• Deck Thickness: .600 in. minimum
• Cam Bearings: 2.120 in. journal bore
• Main Bearings: Standard
• Camshaft Location: Stock
• Lifter Bores: Indexed (stock .8437 in. bore) requires +.300 tall lifters
• Bore: 4.245 in. 
• Maximum Bore: 4.625 in.
• Cylinder Wall Thickness: .250 in. at 4.600 in. bore
• Water Jackets: Expanded to provide better cooling
• Lubrication: Priority main oiling system
• Filtration: Integral mount for spin-on filter
• Crank Clearance: 9.800 in. 4.375 in. stroke
• Main Caps: Nodular iron 4-bolts splayed, stepped registers w/ ring dowels
• Mark IV style fuel pump mount
• Gen VI rear main seal, oil pan bolt pattern, timing cover bolt pattern
• Starter: OEM mount
• Motor Mounts: Dual (front and side)
• Cylinder Head Holes: Blind tapped to prevent leaks
• Weight: 270 lbs.
• Accepts Mark IV, Gen V, or Gen VI cylinder heads

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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