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Butler Performance Custom Short Block, 400 Block, 471-478 cu. in. 4.350" Stroke (Assembled)

BP-SB-400-4350

  • Customized Butler Performance Short Block
  • Choose 4.350" Stroke
  • Create a custom package tailored to you
  • All short blocks undergo the "Butler Process"

Please Call for Availability
(866)762-7527
Availability: Contact us for lead time

Description

434-494 CI short block
Complete Internally Balanced longrod rotating assembly & 
high-performance prepped block

  • 4.350" stroke forged crank    (4-Bolt Billet Mains Caps recommended for 4.5" stroke)
  • Internally Balanced
  • Choose Flat Top, Dish, or Dome Pistons- Add head casting or head cc info at checkout and we will confirm compression ratio
  • H-Beam Rods
  • File fit rings
  • Performance Rod bearings
  • Performance Main bearings
  • Includes Viton Rear Main Seal
  • 400 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
  • Can be upgraded with various options

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

Compression Calculator

400 Block Head cc w/-8cc Flat top
Stroke Bore 72cc 87cc 96cc
3.750" 4.155" 10.38 9.02 8.38
  4.181" 10.48 9.11 8.46
4.000"

4.155"

11 9.55 8.87
  4.181" 11.12 9.65 8.96
4.210" 4.155" 11.53 10 9.28
  4.181" 11.65 10.1 9.38
4.250" 4.155" 11.63 10.09 9.36
  4.181" 11.75 10.19 9.46
4.500" 4.155" 12.25 10.62 9.85
  4.181" 12.38 10.73 9.96
Click here to use our compression calculator to calculate compression with thicker head gaskets, decked block, or other variables.

Details

  • BP-SB-400-4350
  • BP-SB-400-4350
  • Butler Performance
  • Contact us for lead time
  • New

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