12498778 GM Performance 454 Partial Engine

Part Number: 12498778

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Part Number: 12568778
Engine Type: Chevy Big-Block V-8

Engine Includes:
• Fully assembled long block
• Oil pump, pick-up and oil pan
• 14” Auto Trans Flexplate
• 8” Harmonic Balancer
• Front timing cover
• Oil Filter and Adapter
• Passenger Side RH Oil Dipstick and Tube

General Motors Warranty Information

Select the parts below to finish your crate engine and get running in less time!

19154550 Super-Matic 4L85-E Four-Speed Automatic Transmission

19212657 Transmission Controller

19172805 Serpentine Accessory Drive system

12355614 Fuel Pump, Street Performance

93440806 HEI Distributor

19170093 Carburetor, Holley 770-cfm


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Specifications:

  • Displacement: 454 CID
  • Bore x Stroke: 4.250” x 4.000”
  • Compression Ratio: 9.6:1 (with 110cc Heads)
  • Block: Cast Iron, 1 piece rear seal, 4-bolt main caps.
  • Crankshaft: Forged Steel
  • Connecting Rods: Forged Steel
  • Pistons: Forged Aluminum
  • Balance: External
  • Maximum GM Recommended RPM: 5500
  • Ignition Timing: Base 4 degrees BTDC, 26 degrees total