I really can't remember but long time ago my 54 Ford had a valve that sprung a leak, I did find the company and they refered me to I think but not sure Car Quest. and they sold me a $3.oo kit. Came with instructions on bending 4 tabs clean serface with a small wire brush re install the new diaphram and re-bend the tabs. That was over 20 years ago, still have the 54 and it doesn't leak. Sure hopt that might give you the energy to take it apart...
Now if it's the one used on 56 Ford intake manifold that's a diffrent story. Good luck. Gerry