To be honest with you I am not sure 3B.

It is the one from classic parts of america.

http://www.classicparts.com/1947-59-Dual-Master-Cylinder/productinfo/71-201/#.VZIehflViko

I purchased it in a hurry a while back so that I could get into the free shipping price range when I was buying other things from them. I did not look as closely as I should have.

I see now that one port is a 9/16 and one port is a 1/2 inch so I am not sure which to run to the front and which to run to the rear or why they would be different. I have been reading about proportional valves and such but this is all new to me.

Last edited by 1866yellowboy; 06/30/2015 5:47 AM.