The HP 409 was a winder like the small block because it had a 3.5" stroke, big ports and valves, and lots of carburetion, but there was little valve/piston clearance.
Unlike some of the big CI engines of its day, the 409 was not one of the quickest out of the hole but they would run you down before the traps.
A friend of mine had one in a 57 BelAire. I bought a Z-11 cam for him while working in the parts dept at the local Chevrolet dealer in 1968 or 69 ($24.**) and helped him install it. At 1000 RPM idle it would sometimes rattle the windows in the cars beside it at the drive in. Wish I had it.
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Today's Featured Article - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
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