Doing some further reading, several sources note that:
1) Although I'm seeing conflicting information on top speed, there's a consensus the PV-2 could outrun the Zero at level flight.
2) PV-2s were sent in to attack targets unescorted, as they were maneuverable enough to defend themselves against enemy fighter defenses. That's pretty impressive considering they were primarily used against the highly nimble Japanese fighters
3) Ordinance totals of up to 6000lbs of bombs, with a pair of 1000lbers on external hard points and 4000lbs in the internal bays.
4) The two external bombs could instead be replaced with external fuel tanks for further extended range.