Anyone running Firm Feel UCA's with smaller ball joints?

Just wondering if anyone is running Firm Feel's tubular UCA's with the smaller ball joints that will work with factory Kelsey Hayes brakes? I've got a 70 duster and looking to rebuild the front suspension and upgrade things a bit.

I'm looking at possbily tubular UCA's but I am trying to keep the factory Kelsey Hayes brakes and the SBP wheels so I can run the factory rallyes. Some may think I am crazy, but that's the look I like. I wll probably be running 1.03" torsion bars as well as a full upgrade to polyurethane and rubber components as well, so everything is fresh.

What are your thoughts? Any help would be appreciated!