The CT have the pot metal pump. Not sure about any others.The Lyc oil pump problem may be limited to some of the C series engines: the CT and the Cs used in Gardners for sure, but I was advised one of the Cs used in an Auburn had a cast iron pump.
Thats great information.It’s usually easier to find a good replacement motor than weird old engine rebuild parts.
I’m the Central CA “IHC Warehouse” but don’t remember having one of those motors.
Here in the San Joaquin Valley, trucks might’ve gotten wrecked out but engines/ chassis were kept to run Irrigation pumps or other farm-related tasks. This stuff is still all around us.
To illustrate my point: I recently bought a $225 1920s GMC truck without a motor. Without much work found a running motor about three hours away. The “donor” is a 1921 GMC shortened into a tractor. At the same place I bought the first GMC the seller had an ancient Best Tractor that was skeletonized to an Irrigation pump.
Don’t get stuck on application. Look around. Take a trip to Central CA before it gets hit!
Good Luck! I’ll be looking for you!