Polsten Parts master break cylinder

[Lynn Eades]

If you want to be sure, then buy a new one. There are many vehicles that used a similar m/cyl. The critical things are the bore size, and the mounting flange. Be careful if you buy a kit. Usually a kit does not contain the piston and spring (although this is not aways the case) the next thing is that pistons can vary in length, and the wrong piston wont work. When it is assembled the primary cup (solid one) needs to be just clear of the transfer port. It is simle stuff really.