10243869 - Chevrolet Performance 5.0L 2-Bolt Main Bare Block

This product may require vehicle validation(s) for proper fitment. Please contact us to confirm correct vehicle fitment and usage.

Availability: Item has been discontinued and is no longer available


Brand new 305CID / 5.0L Bare Block from Chevrolet Performance

Casting Number: 10243878 / 10125327
Material: Cast Iron
Weight: 147LBS.
Block Finish: Black Paint
Main Caps: 2-Bolt Cast Iron
Oil Pump Mounting: Conventional Wet Sump
Oil Filter Mounting: Spin-On
Deck Height: 9.025”
Deck Finish Machined: Yes
Lifter Pattern: Conventional
Finished Bore Size as shipped: 3.7360” - 3.7377”
Cylinder Wall Thickness: 6.62mm or 0.2606”
Bore Finish: Finished Honed
Cylinder Bore Design: Open
Main Bearing Journal Size: 2.45”
Oiling System: Pressurized Priority Mains
Dipstick Hole Drilled: Drivers Side through head deck
Crank Seal Style: 1 piece insert
Maximum Stroke: 3.750”
Fuel Pump Mounting: Machined Boss, NOT Drilled for Pushrod
Cam Bearing: Finished Cam Bore with Bearings Installed 1.8717” - 1.8707”
Lifter Type: Hydraulic Roller
Front Cover Mounting Holes: 10
Bellhousing Mounting: Conventional SBC 10 X 1.5mm
Starter Mounting: Holes Drilled and Tapped, English 3/8”
Motor Mount Holes: Drilled and Tapped 10 X 1.5mm

Application List



  • 10243869
  • 10243869
  • Chevrolet Performance Parts
  • Item has been discontinued and is no longer available
  • New


Shipping Information

  • Item Requires Shipping
  • 175.0 lbs.
  • W25.5000” x H22.8000” x L38.3000”

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