Sportsman BBC 454 Finished MB 2-Pc
Sportsman BBC 454 Finished MB 2-Pc
 $999.99 

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Specification Overview

Sportsman Series
BBC 454: Finished Machined Block
4.280, 4.290, 4.310 Bore; 454 Mains, 2-Piece Rear Main Seal 

  • Seasoned GM production, Mark IV (non-roller), 2-bolt block
  • Block is oven baked and shot peened to settle molecular structure    
  • Magnafluxed for cracks and clearanced for strokers. Additional clearancing may be necessary depending upon your rod and stroke combination  
  • Block is precision machined on our 4-axis CNC equipment
  • Cylinders are finish honed with Sunnen CV 616 and torque plates with 820 Sunnen stones
  • Mains are line bored on our Winona Van Norman line boring equipment
  • Mains are finish honed on Sunnen CH100 Line Hone
  • 2-bolt mains using ARP main bolts
  • Cam bearings and brass freeze plugs are installed along with all alignment dowels
  • Block is assembled with a 2-piece rear main seal for 2-piece crankshaft applications