I think you have all of them. If you go to google maps and type in B8 it gives an outline of the whole area.
There used to be a sign on the Alum Rock Road after the Rock indicating where Saltley ended and Alum Rock began. I don't think it's there any more but it always surprised me that the boundary was not earlier. Can vaguely remember a similar sign on Washwood Heath Road but can't recall where it was.
Going back to the google map, when you type in the roads some come up with an area - Highfield Road, Saltley - Morris Road, Ward End - Clodeshall Road, Alum Rock.