I own a 280zx with 6 - 12 bolts nuts attached to the wheel side of the axle. My rubbers burst and my mechanic claims that it cannot change.
So I both a pair of axles with the 6 - 12 bolts configuration and now the part sliding into the diff. is too thick for my diff.
Can any other axles work?
Can the axles be seperated and serviced?

 

what did u end up doing ???

72 240Z restoring
72 240Z RB25DET Conversion
78 260Z 2+2 Daily Driver

 

You can replace both boots by removing the inner cv ( or Tripod ) joint, and replacing the outer and inner boots from there. The shafts you bought are for the bigger R200, some 280ZX's (auto) were R180 with the smaller shaft.