Aluminum IAII Builder Kit by Butler, 600-700hp Pump Gas 505-535 cu.in. w/ IAII Block, Ready to Assemble

• Forged or Billet Crank 4.250 - 4.500 Stroke 2.200 Rod
• Eagle Rods 6.800", ARP 2000 Bolts
• Ross Pistons by BP 4.350" bore (Any Compression Ratio Avail.)
• Ferrea Pins .990 x 2.930"
• Rings Total Seal/Classic Race
• Race Bearings Rods, Mains CL or FM
• BP Billet Timing Gears & Chain
• Main Studs
• Comp Flat Tappet, Hyd. Roller, or Solid Roller Cam
• Roller Rockers
• Canton Oil Pan
• Butler Pro Oil Pump
• HD Oil Pump Drive Shaft
• Performance Damper
• Timing Cover
• Edel. 340 CNC Heads, Ported, Ferrea Valves, BP Valve Job, Springs, 10deg Retainers/Locks, 7/16 Studs
• Choice of FAST or Holley EFI
• Choice to add EFI Tank Solution. Click here to see EFI Solution Kits
• Intake
• Water Pump
• BP Push Rods
• BP Aluminum Valley Pan
• Internally Balanced
• Ready to Assemble

  Options:

 IAII BLOCK

• Siamese Cylinders: 4.170 to 4.400" bores with min. of .200 wall thickness @ 4.400 bore. This provides outstanding cylinder wall rigidity. No other block has this
• All steel registered main caps: With splayed four bolt pattern on the three center mains which adds rigidity
• Block cast: Allows clearance for 4.750 stroke crank.
• Main webs: Strengthened to maximum width possible.
• Cam tunnels: Reinforced.
• Wider pan rails: Provides better oil pan gasket sealing and gasket retention.
• Thicker deck surfaces: Provides added strength and aids in cylinder head sealing
• Solid lifter galley: With drilled oil returns that prevents lifter bore breakage and adds strength
• Improved oiling: Front main oil feed, which adds longevity and helps prevent front main bearing "starvation".
• Bottom of the block: Is solid to the bend, above the pan rail, for added strength
• IA II Blocks have Redesigned Block Cooling Passages: Improves cooling to all cylinders.
• Provisions for external cooling: 1/2" NPT holes provided at rear of block. Gives you the option to dry deck the block.
• Dual bell housing bolt patterns: For both Pontiac and "corporate" housings.
• Lifter bores: Are deeper to allow the use of standard type "corporate" lifters.
• Bottoms of cylinders: Are notched to clear strokes up to 4.75". A 5.0" stroke is possible with some grinding.
• Head bolt bosses: Are tied to cylinder walls and the exterior block walls are thicker for added strength.
• Oil filter passages: Are threaded for easy remote filter mounting. Oil pump passages have corner plugs at 90 degree turns to reduce flow restriction. (Plugs are included with kit.)
• Threaded front external oil passage: for lubricating superchargers or turbo's. The IA II Block uses standard Pontiac 5 bolt Motor mount pattern.
• Standard deck height: IA II Blocks are available with 3" or 3 1/4' ' mains .
• Threaded freeze plug holes: For safety and wall rigidity. (Freeze plugs are provided with block.) This lessens the chance of the engine blowing out a freeze plug. 
  
  
• * Drilling is required to match your heads water holes. Estimated drilling time; 10 minutes.
• There is no longer a material alloy surcharge!
• Our IA II blocks are machined buy one of the best aftermarket engine machine shops in the country. All blocks are check out on a CNC coordinate measuring machine with-in process probing during manufacturing. We pressure test and sonic check every block. IA II Blocks come with a full warranty for material and workmanship.
• ALL Blocks are shipped DRY DECK*

Images show assembled with optional parts. Contact us for detailed quote for your application and specifications.