For product assistance, please call (386) 279-3171.
The BMP 409 aluminum "W" block is the first after market block and the only replacement block in over 50 years!
It is basically a Big Block Chevy. It accepts the following to assemble it...
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 )
Please visit Lamar Walden Automotive If you are having any trouble locating any of the special components that are required then give them a call as he has researched all the custom parts required and may even have them on the shelf!
If you have any additional questions, feel free to contact us.
409 Aluminum Block Specifications
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