Looking at your photos you cannot tell what configuration transmission you have as most of the changes are on the inside. If the front and rear bearings stops are part of the housing, it is an early housing, the later used snap rings. You have to be careful which oil baffles you use with either. If the main shaft has an integral thrust washer at the front it is an early shaft, the later have a removable type that looks like a key ring. There are other subtle changes. All transmissions are interchangeable except for the very early that mated with a multi-disk clutch.
I did notice that your rear bearing retainer is a later one. There are two basic types. The early have an irregular bolt pattern where the U-joint housing bolts on. The later have a symmetrical bolt pattern. Note that the gaskets for this area are slotted on the side. Either style will work with the transmission, the concern is what bolt pattern your U-joint housing pattern is. Before you install the transmission check that the rear bearing retainer, the inner part of the U-joint housing, and the two clam shell parts line up with all the bolt holes in line. If you don't, you may find that when you install the rear end you can't get all the bolts in the U-joint housing.
Whenever I sell a transmission I rebuilt I supply the buyer with both style rear bearing retainers and caution him to find out which he should use.
The towers are all interchangeable with the transmission housing.
Tom Endy
