Originally Posted by Hotrod Lincoln
Have you run the casting numbers? A 1950 COE would have had a spray-oiler 235 originally. 261's didn't come out until 1954.
Jerry
My particular engine has serial no. stamp ending F55N, indicating a 261 from 1955. Obviously not original to the truck. Not in my possession yet and don't know the casting number.

The pic posted above is not my engine. It's the only representative photo I've been able to find showing an AD COE manifold layout.

Last edited by Skooter; 01/12/2023 12:10 AM.
Matthew 6:33

1952 Chevy 1/2-ton 3100
Late '55 235/SM420/torque tube 3.55
Dalton Highway survivor (using original 216)
www.truckwithaheart.com