Brake Pedal Box 1960 TR3

In rebuildibng the brakes on thsi car, I have a replacement pedal box that  I 
have cleaned and painted. 
Is there a secret to removing the box? I am refering to where the pedal  
connects to the brake and clutch masters. I have removed the cotter pin, , but  
the two bolts that hold each pedal in are not budging. I think it must be  
simething simple that i just don't see. TIA 

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