Butler Performance Budget Short Block, 389 Block, 421-427 ci, 4.000" Stroke (Assembled)
- Customized Butler Performance Short Block
- Great budget friendly package tailored to you
- Rated for up to 500hp only
- All short blocks undergo the "Butler Process"
406-412 CI short block (Assembled)
Complete Internally Balanced rotating assembly prepped block
- 4.000" stroke Forged crank
- Internally Balanced
- Choose Flat Top, Dish, or Dome Pistons- Add head casting or head cc info at checkout and we will confirm compression ratio
- Total Seal Rings- File Fit
- 6.635" I-Beam Rods on 3.750" Stroke
- Performance Rod Bearings
- Performance Main bearings
- Includes Viton Rear Main Seal
- 389 prepped block
- 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
Included reusable engine cradle
Images for display purposes only and could show optional parts. Contact us for a custom quote for your application and specifications
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