gday mate,
Everyone uses different pound line to chase barra. Personaly i use 30-40 pound braid. But some impoundment guys go as low as 20 and bellow. However these are heavy hard fighting fish and you would hate to lose a big girl due to line breakage. So i would probably recomend using as heavier line class as you can get away with on your Sol. Beef up your leader as well. And you shouldnt have to many dramas dropping fish! Hope you get into some big chromies mate!
Take care
Matty