I think the bushings needed a 13/32 drill bit but you should measure your pins and bushings to be sure.
Use a drill press with the hinge bar clamped securely in a vise. Trying to use a hand drill motor just about guarantees a broken bit. I think I did final fitting with an expandable reamer.

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.