My new dual master has the following configuration: Rear reservoir is the larger of the two and takes a smaller size brake line. The front has a smaller reservoir and a takes a larger brake line Which one is for the rear brakes and which one is for the front?
Small is for the rear http://mbmbrakeboosters.com/index.php?option=com_content&view=category&layout=blog&id=8&Itemid=16 If the link works I think it's indicating smaller is for the rear.
brakes My '58 has an aftermarket dual master cylinder and the smaller reservoir is for the rear. The rear brakes only do about 40% of the stopping. therefor only needs less pressure and less fluid. Gerald in Florida