mate - if you ever get time, I've got that shell sitting here still if you wanted that rear 1/4 section to cut out. I also have a few 1200 master cylinders and pedal setups here, so if you bring the 'donor' master cylinder with you, we could probably work it out quick smart.

What diameter is the 180b master cylinder bore?

Going to run no booster

I've done this on the clutch master. I don't expect the brake master to be much different. I know the bolt in between the F and R outlets holds the master cylinder piston in place. You'd have to look at your exact situation. From memory they all use a c-clips in the end. Booster or no booster.

Is it that easy?

Just swap over the 1200 cleavis shaft to the 180b master.

Hi I have a Datsun 180b master I want to fit to my 1200 any ideas how to do the pin setup as the 180b master has no pin as is setup for booster, how have you's done this in the past?