Finishing the power brake conversion
We finish out the power brake conversion on the '66 Mustang by adding a vacuum port to the intake system. The intent was to separate the PCV (positive crankcase ventilation) from the rest of the vacuum operated items (brake booster, transmission, distributor).
So, we whittle out a carb spacer plate from some 1/2" aluminum so a dedicated PCV port can be added. The original port in the intake will handle the other chores.
The butterflies on the Weber carb are different sizes so the center hole has a unique shape.
Here a bung is temporarily held in place with a bolt for welding.
Custom carb spacer with port
Austin TIG welds threaded bung to the plate
The hole in tapped for a barbed hose fitting and everything reassembled. The new fitting pulls engine vapors through the PCV valve on the valve cover.
The new fitting pulls engine vapors through the PCV valve on the valve cover