msd 6a fault???

hello there, brand new dizzy and coil, car started,ran, drove round block, perfect, started car later that day..........perfect. left it a week, wouldnt start.been suggested to buy a ATE 6AL due to so many msd 6al failings? or can i ditch the elec box and put a ballast resisistor in there and run coil+ to batt....but then theres two wires to dizzy..........hmmmm.