Not sure yundar has the leak at the seam issue, or just the flooding issue. If just flooding, it may be able to be fixed without opening the distributor, just freeing the piston and adjusting air plate.
On the right of the picture are the o rings Tony is referring to.
As you can see by this old fuel distributor I bought to rebuild as a spare, it can get a little ugly inside when left to sit for years. There are rebuild kits available on Ebay. They include a new metal diaphragm and o rings. It takes careful assembly to get the o rings to stay in place when putting the 2 halves together. With a little care many can be restored, if this is your problem.
The main fuel pressure issues can be taken care of by making sure the o ring is in good shape, and spacers are used to adjust spring pressure.
