master cyl. for pwr.disc brakes

On some cars there are different part numbers due to a slight bore diffference in the cylinders.

Some books show a change up to what looks like a drum cylinder. I have never used that one with the two ports the same, for that reason.

In any case, I have used the "manual" cylinder with a powerbooster, with no issues.

I would try that if I were you. You won't even need to bleed the brakes if you do it that way. Just set the master there with the lines still hooked up.

Important thing on the swap, is that there is no other vacuum accesory in the same line as the booster (ie pcv valve) it will cause a crappy pedal feel.