I'd recommend Konny's Allied Legions mod in the unofficial mods section. It allows you to recruit Bruttians, Ligurians etc in Italic settlements, in fact you can only recruit high end latin troops in Rome.
Also give a nice description of Camillan/Polybian Consular Armies including the allied legions.
One of the best add on mods for EB I feel and I've found very stable.
In fact Bruttians are my favourite Roman unit!