Originally Posted by theduff
Normally we always assume wide deck unless otherwise stated. Thatís probably because Lycoming came out with the wide deck architecture in the late 60ís. Nothing wrong with the narrow deck but most of them have are very high time but I still build them occasionally.
Narrow Deck cylinders are still being manufactured. I have four Superior Millenium 320 cylinders in my hangar on the shelf. They are Narrow Deck cylinders. I also have four ECI 320 Narrow Deck cylinders with S/N not on the AD list that were manufactured after the AD was issued sitting on the shelf. So I have 8 narrow deck 320 cylinders sitting on the shelf and only four 360 Wide Deck Cylinders on the shelf.
The Narrow Deck cylinders are still being manufactured so when you ask for cylinders, make sure you know what you need or want else someone may provide what you did not want and cannot use.