Latest Brothers Catalog page 109. If you want to go to the Brothers site to see it, its called 1947-59 Dual Master Cylinder Conversion. (Part No. DMC5900). Doesn't matter that its Brothers, its the same company that makes them all. Don't worry that the cylinders do not line up. The bracket will put your new MC 3/4" too far towards the passenger side, then the plunger rod has a fix for that. Look real close at the pics and if you need more clarification, let us know.
The swiveling end on the plunger rod has a long bolt and a spacer to make it end up in the right place.