Rear Wheel Cylinder size?

Is it 27/32" or 29/32" for the standard brakes on a 1965 9" HIPO rear end??

Well I ended up going with the 29/32" size mainly because the 27/32" one was generic and fit both sides while the 29/32" were side specific and besides whats a couple of 32nds between friends?? (LOL)