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Butler Performance Budget Short Block, 389 Block, 395-400 ci, 3.750" Stroke (Assembled)


  • Customized Butler Performance Short Block
  • 3.750"Stroke
  • Great budget friendly package tailored to you
  • Rated for up to 500hp only
  • All short blocks undergo the "Butler Process"

Please Call for Availability
Availability: Contact us for lead time


406-412 CI short block (Assembled)
Complete Internally Balanced rotating assembly prepped block

  • 3.750" 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
  • 6.625" I-Beam Rods on 3.750" Stroke
  • Performance Rod Bearings
  • Performance Main bearings
  • Includes Viton Rear Main Seal
  • 389 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

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


  • BP-SB-389-3750
  • BP-SB-389-3750
  • Butler Performance
  • Contact us for lead time
  • New

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