out of commission, cant drive my dart anymore

I think its this that im thinking of? The K-H setup i have already has a new lower ball joint connected to the knuckle..so what do i have to do to use it with my current drum a-arms?

In a nutshell, If your KH knuckle already has the ball joint attached, remove the drum brake knuckle from each ball joint and substitute the KH knuckle. As others have said, now is the time to do the UCA bushings and ball joint and LCA bushing