Originally Posted by tclederman
Near the bottom rear of the manifold-side of all my 261/235 blocks is a hole with this style of drain fitting.

Lower right of this photo.
On '55 2nd and later, that style drain seems to only be found on the 235 used in the Forward Contol Chassis (box van), pickups and heavy trucks didn't have them according to the shop and assembly manuals.


Bill Burmeister