Master Cyl. Question

Technically you are looking at one M/C for manual brakes (has a rod) and one M/C for power brakes (no rod). It would be easier for you to buy the M/C for manual brakes if it comes with the rod. The only difference between the two is the presence of the rod. The rod can be switched from one to the other. The rod is held in place by a small, square "O" ring inside the piston, at the end of the rod. By putting it in a vise, you can separate the two, overcoming the locking pressure of the "O" ring. The problem is locating a new "O" ring. I don't know if it is available separately. Good luck.