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12605117 - GM SBC 350 4-bolt Short Block

Availability: Discontinued, No Longer Available.


12605117 - New from GM performance parts, Partial engine assembly used with GM 10067353 (Universal 350 & 12499529 (290 HP 350) Built from all new parts, assembly includes:

  • Cast iron 4 bolt main block with 2 piece rear main seal- Non factory roller compatable
  • Nodular iron crankshaft
  • Powdered metal connecting rods
  • Dished aluminum pistons (12cc dish)
  • Brass freeze plugs
  • Cam bearings
  • Can be used in marine applications
  • Provision for mechanical fuel pump
  • Requires pre-1986 oil pan
  • Note: Oil Pump Is Not Included

When used with 76cc heads compression ratio will be 8.5:1

When used with 64cc heads compression ratio will be 9.6:1

When used with 62cc heads compression ratio will be 9.8:1

When used with 58cc heads compression ratio will be 10.3:1

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All prices subject to change without notice.