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Chevrolet 409 W Block

BMP 409 Chevy Aluminum Block

Bill Mitchell Products with the experience of 409 guru Lamar Walden got together to develop the one and only, brand new aluminum 409 engine block. First 409 aftermarket block in 50+ years. 

 

1. BBC crankshaft up to a 4.250"

2. BBC harmonic balancer

3. BBC connecting rods

4. Custom 409 pistons

5. BBC timing chain and cover

6. BBC camshaft but with 409 lobe positions

7. 409 Lifters

8. BBC starter

9. BBC oil pan

10.409 style water pump

11.409 pulleys and brackets with the exception of needing a BBC bottom crank pulley (Lamar Walden Automotive has a complete serpentine belt set up if needed )

 

 

TECHNICAL INFORMATION:

 

  • Deck Height: 9.600 Std
  • Bore Size: 4.240
  • Max Bore Size: 4.530
  • Cylinder Bore Spacing: 4.84"(stock)
  • Crankshaft: Standard BBC clearanced for 4.250
  • Rods: Standard
  • BBC Pistons: 409 special w/valve notches relocated
  • Cam: 409 special w/BBC cam bearing journals
  • Cam Location: Standard BBC Lifter
  • Location: Standard
  • 409 Lifters: Special 409 Lifters
  • Lifter Angles: Int.45°/ Ex.45°
  • Timing Chain: Standard BBC
  • Oil Pan: Standard BBC
  • Oil Pump: Standard
  • BBC Oil Pump Drive: Standard BBC
  • Timing Chain Cover: Standard BBC
  • Water Pump: Standard 409
  • Cylinder Heads: Standard 409
  • Intake Manifold: Standard 409
  • Distributor: Standard BBC w/.300 spacer under the collar 

 

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