Have you found out why your secondaries won't open?  One common problem is the gaskets where the vacuum housings bolt to the carb.  They can be installed in any of 3 different ways.  One way is right.  One way blocks the vacuum from getting to the diaphragm.  One way creates a vacuum leak.  With the common connection between the carbs, a vacuum leak at one housing will also leak the vacuum from the other one, so neither works.  You probably don't need to ask me how I know this.

John - "The Hoosier Hurricane"