Tires and all look like a military tandem. Can't tell much about the front third member, but it kind of looks like a Timken. Timken later became Rockwell and now Meritor. Does it have a yoke on the back side of the front banjo housing. I would sure think this was a twin screw at one time because it looks like the equalization is 50 50. With a drag, they usually put 60% or more more on the driver. If it runs, the power divider may be locked in. If it is unknown as to whether it runs, someone may have just canibalized the back driveshaft.