Looks like a standard late 28-31 transmission to me. Hard to say much more without taking it apart and seeing if it has the snaprings or machined retainers in the bearings. Rod
I seem to remember that externally the trans cases are the same, the spacers on the cluster are on the early case. If there are internal bosses and no spacers its the later case. That's the case steve mitchell is scouring the planet for. Bob