I didn't think that Cordillo Downs had a cross strip - I stand to be corrected on that though.....
I would have guessed at Durham Downs, but there isn't enough bush to the east. Next guess would be either Ethadunna(sp?) or maybe even mungerannie...but it is missing the ranges to the west. or maybe even Nappa Marie ?
Durham Downs about 45nm N of Ballera. Mungerannie about 92nm East north East of Leigh Creek. Clifton hills about 170nm SSW of Birdsville. Nappa Marie about 25 nm ENE of Innamincka
(how am I doin here DF? distances about right??? been a LONG time!).... petal!