On really stubborn pin alignment problems, you can use a tapered drift punch from the side you will be inserting the pin from to get the holes close, then use a pin punch or a solid pin close to the hole diameter (with the end chamfered) from the other side to get the holes lined up, then use it as a slave pin and push it out with the pin.
If you can't find a solid pin or pin punch with the right diameter you can probably find a drill bit that is very close and use that as the slave pin. I have a complete set of drill bits incremented in 1/64" that I have used as slave pins on some VERY difficult pin alignment problems.
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Jim
CBOB0497
"That rifle hanging on the wall of the working class flat or laborer's cottage is the symbol of democracy. It is our job to see that it stays there."
- George Orwell
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