Don't take this the wrong way, but if you don't know what a dishing gauge is, well, I am a little concerned about how you will rebuild the wheel.
How did you bend the rim from a broken spoke? How bent was it?
Unless you plan to build wheels, or frequently true them (meaning you probably are not doing it right), you can get by by truing it on the bike--- to see if this is the kind of puzzle you enjoy playing with.