How do you remove brake pushrod from master cylinder?

this is a used one out of a volare and i'm just putting in an adjustable pushrod, guess i'll have to check the parts store, thanks for the help guys!!

Why use a used master out of a Volare ?
A fresh rebuilt m/c at (Autozone,ect) is $20.00
No adjustable pushrod needed.
And if you can afford any new part on a car,a new m/c would be it.
Concerning brakes,this is ,for the most part,the most important part on a car.Stopping is important. No time to scimp out now.