intergral ball joint drum/disc

im starting my from disc brake swap on my 69 cuda i got spindles from a 78 volare nd yes ive read and studied the slight differences in spindles but anyway i have the ball joint intergrated into the steering arm and the 2 holes that the drum spindle bolt onto dont line up wit my disc spindle they need to be futher apart. so my question is r the drum and disc intergrated ball joint steering arms different as where the hole line up