4.840” & 5.0” Bore Space
These blocks are intended for serious blower racers utilizing BBC based engines. The 1040Y can be used as a replacement block for KB Olds or Arias New Century blocks. The 1041Y raises the cam to +.400” for larger cam cores and better push rod geometry. The 1050Y & 1070Y are cross bolted, 5.0” bore space, BBC blocks. These blocks are intended for use in radical blower combinations. The 1050Y features spread .160” mains and a +.400” high cam, while the 1070Y raises the cam to +1.0”. These blocks allow the motor builder to use bores of 4.600” to 4.750”.
- Premium CN Billet material
- CNC machined at CN Blocks
- Includes block, caps, main studs, and sleeves installed
- Standard deck heights available: 10.2” and 10.7”
- Optional deck heights from 9.5” to 10.7”
- Big Block Chevrolet main size
- Aluminum main caps
- All 5 main caps are cross bolted
- 9/16” Tool steel main studs, 1/2” side bolts
- Cam sizes available: BBC, 2.125” 55mm, 60mm, or 65mm
- Lifter angle to match cylinder heads
- Lifter sizes available: .842”, .904”, .936”, 1.00”, or 1.062”
- Optional Jesel keyway bushings
- Stock distributor locations or distributor delete
- Priority main based oil system
- Special CN Blocks cam oil cross
- #12 AN oil inlet
- Wet sump available on 1040Y & 1041Y
- Dry sump or external wet sump only on 1050Y & 1070Y
- KB Olds or CN Blocks wide pan pattern
- GM bell housing pattern
- Dual started bosses
Also Available With Water Cooling
