5.0” Bore Space, Raised Cam Blocks

The 1050 an 1070 series are 5.0” bore space splay cap blocks. The 1050 and 1070 series blocks are offered in a spread .110” or spread .160” main spacing configuration. The 1050 blocks are used for motor sizes up to 740 cubic inches. The +.400” high cam design is well suited for CFE, Eicke-Brodix, and Ray Franks cylinder heads. The 1070 blocks are very popular for all 5.0” bore space motors from 500 to 800+ cubic inches. The +1.0” high cam design is well suited for Alan Johnson, CFE, Eicke-Brodix, RFE, Sonny’s GM Hemi, and Sonny’s GM Wedge cylinder heads.

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  • Premium CN billet material
  • CNC machined at CN Blocks
  • Includes block, caps, main studs, and sleeves installed
  • Standard deck heights available: 11.100”, 11.500”, and 11.625”
  • Optional deck heights: 11.00” to 12.00”
  • Head pattern to match cylinder heads
  • Big Block Chevrolet main size
  • Aluminum main caps
  • Splay bolt main caps (front four)
  • 1/2” main studs
  • Cam heights: +.400” or +1.0”
  • Cam size to match cam core: 2 1/8”, 55 mm, 60 mm, 65 mm
  • Lifter pattern to match cylinder heads
  • Lifter sizes: .904”, .936”, or 1.062”
  • Jesel keyway bushings available
  • No distributor on most 5.0” blocks
  • Priority main based oil system
  • Special CN Blocks cam oil cross
  • #12 AN oil inlet
  • Dry sump or external wet sump only
  • Valley oil scavenge
  • DRCE 10 3/8” oil pan pattern
  • Dual starter bosses

Lightening Option Available

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