I think one for a 69 C-body disc brake car will work. I have one on my 66 but it is a console shift car. The later model boosters will interfere with the column shift linkage but I think that is the larger single diaphragm one.

The 65 column shift is cable operated so it might not be an issue meaning anything from 69 to 73 and perhaps later might work if your car is column shift.

Kevin