Dual Circuit brake system for drum brake A

[bilking@comcast.net]

Anybody converted the single circuit mastercylinder to a dual circuit?  I get a 
whole lot nervous looking at the combination clutch/brake unit on my 59 A.  
Perhaps a dual circuit MGB MC with a separate clutch cylinder as a start point. 
 I don't know think proportioning valves and checks would be needed since I 
have a drum brake car.

Comments welcome

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