Well, we think we have a suitable donor for Ellodee's Raby type IV.
Jeff, Ryan and I went to Aubrey's today and picked up a FI non running bus motor. It seems to be in fairly good shape. The only problem evident at this time is a dented area inside the block from a thrown rod. The motor was previously rebuilt, but it looks like it was a poor job.
Here are the tear down pics. Thanks to Jeff and Ryan, It's ready for cleaning and inspection.