The bushings should probably be a light press fit so they don't turn inside the hinge bar. You could probably use some stud and bearing mount (loctite has that) to basically glue them in place. What I did was drill all the way thru just a bit undersized for the bushings, then ream the entire hole to size. You may have to file the spacers on each side of the hinge body for the bar to fit in with the bushings.
The oil hole is probably 1/16" in size all the way to the pin bore. Run a small drill thru so you can get oil into the hinges. A pinhole is probably a bit small. And you should oil the hinges occasionally to be sure the pins don't bind up. It will be less of an issue with the bronze bushings, but still a good idea. The pins should be a TIGHT fit in the hinge body with the only movement between the pin and the bar.
I was going to drill that oil hole some but a small drill bit would not reach in that much.
