Datsun 1200 used two types of Propeller Shaft:
- Replaceable U-joints
- Non-replaceable
If yours has snap rings (C-shaped circlips) holding the U-joints in, they are replaceable.
Automatic driveshaft/tailshaft differs from Manual Transmission.
B210 with H145 Differential and B110 use the same tailshaft.
B210 with H150 diff use same shaft as B310 (?)
B120 with H165 differential *may* be same as B310 shaft (?)
Longbed Trucks use a 2-piece tailshaft.