Butler Performance Custom Short Block Kit, 389 Block, 447-454 ci, 4.250" Str (Unassembled)
- Customized Butler Performance Short Block Kit
- 4.250" Stroke
- Great budget friendly package tailored to you
- All short blocks undergo the "Butler Process"
389 short block kit
Complete Internally Balanced rotating assembly prepped block
- 4.250" Stroke cast or 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
- 6.800 H-Beam Rods on 4.250" Stroke
- Performance Rod Bearings
- Performance Main bearings
- 389 Block 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
- ready to assemble
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
- Butler Performance
- 10-12 weeks (slightly longer for full custom pistons). Ships to business address. Residential or liftgate are available for additional charges
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