SOLD Butler 406 c.i. / 400/557 Assembled Shortblock

This Short block kit utilizes the later model 400 block (557 casting) in stock stroke (as not to overstress the block) with forged pistons and eagle crank. This kit is a great foundation for a complete engine build capable of up to 475 hp on pump gas. Top it off with a good set of cast iron or Edelbrock heads for a strong and powerful muscle car engine.

• Customized Butler Performance Engine


• 400 557 Casting Block 2-Bolt Main With Main Studs


• 4.150 Bore, 3.75 stroke, 6.625 rod 


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  Eagle Crank 3.75 Stroke, Cast
  
  


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  Eagle Rods 6.625" 3D Rods
  
  


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  Forged Pistons- Flat Top
  
  


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  Total Seal Rings
  
  


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  C77/KBE Race Bearings
  
  


• Dipstick and Block Tubes Installed


• Aftermarket Factory Style Oil Pan


• Melling Select Oil Pump and Driveshaft Installed


• 1pc Viton Rear Main Seal Installed


• Engine Accessory Stainless Bolt Set


• Comes With Complete Blueprint Sheet

Can add paint for, $80 plus paint. 

Also can add HR cam installed with timing cover. $250 labor plus parts

• 400/557 Performance Prepped Block




• cleaned


• magnafluxed


• sonic tested


• completely deburred


• bored and honed with torque plate


• line honed with ARP main studs


• deck squared


• cam bearings and brass freeze plugs installed


•  Assembled by a Butler Engine Specialist