1) She would have done it herself if she was male.
2) She would have done it herself if she were male.
Sorry to rain on everyone's parade, but neither example is correct. The proper usage is:
3) She would have done it herself had she been male.
This is because the final clause describes an event in the past of "She-who-is-not-named" in the narration, and even though both "was" and "were" are usually past tense passive verbs, they're being used in the subjunctive, which use overrules those rules. Of the two examples at the top, the second is more correct than the first, but still not completely right. One way to change it might be this:
4) She would do it herself if she were male.
In this case, the decision to use one or the other would be determined by the time frame of the narration, not just by the rules of grammar.
The Grammar Commissar strikes again!
