10"drums front and 9"drums rear, what master Cylinder use?

Yes, first verify what you have.
Front and rear drum brakes.
You can figure out the diameter from the maximum size allowed for cutting.
It will be marked someplace on the drum casting. Either where the shop manual shows or where I added a second arrow are common locations.
upload_2019-2-27_10-8-54.png

If that is not readable, then measure the inside diameter.
Also measure the width of the shoes.