Thanks Mal. Right now my packard is in many pieces, so I won't register it right now. I am not comfortable with computer (my wife is typing and researching for me). I found and read those posts you referred to. Thank you. From those I found others having same troubles, but no answers. Still working on a solution...

I am seeking information on how to upgrade my 1953 Packard Clipper brake master cylinder from a single circuit to a dual reservoir system to operate drum/disc
brakes. I am not successful so far in finding a cylinder that will fit into the tight space of the old one. Any ideas? I appreciate your help.