Disc brakes from 79 cordoba on a 74 scamp??
I have done it!
I used 78 volare brake setup......same thing
if you have a pre 73 car then you need the 73+ big balljoint upper control arms.
All you need to do is bolt on the old style (A-body) lower ball joint to the newer style spindle. Then everything will bolt right onto your A-body.
Oh yea, keep the two lower ball joint assembly bolts from the A-body because they are different than the new style bolts.