Ball joint adapters?

Hey all, been a while since I've posted on here but have been lurking lately haha.

Finally getting back at working on my scamp after having to store it due to nowhere to work on it and looking at suspension stuff. I eventually want to go to a tubular coilover set up but for now really just want to drive my damn car. Shes been sitting there staring at me all sad.

Anyway want disc brakes and saw the doctor diff ball joint adapter sleeves and was wondering if anyone has used them?

Are they good? safe? Just street driving/ cruising for now with a magnum 5.2 going in. No racing but no doubt a street pull or 2 and a couple burnouts for good measure.

I was gonna go to the 73 and later UCAs but figure if these work then I can save the money to put toward the eventual tubular stuff.

TIA
Marc