Disc brakes from 79 cordoba on a 74 scamp??

thanson_mopar said
...if you have a pre 73 car then you need the 73+ big balljoint upper control arms...

I'm doing the swap on a 1973 Scamp (with 10" drums, if it matters), will I need to use the UCAs from my F-body or will the original A-body ones work?