Always best to play on the safe side. I just installed sway-a-way adjusters on the front beam of the '67. (I already had CB Performance 2 1/2 inch dropped spindles)... I elected to put the "lowered" type ball joints on mine as well, even though I will only actually be lowering the torsion arms themselves about 1-2 inches. As you said, probably not needed, but this way of thinking has, if nothing else, at least kept me off the side of the road. A broken ball joint will definitely leave you there.
By the way, D.J...I prefer to call it "scuffing" the front apron, not "ripping it off"....just kind of sounds cooler.
The end result, I'm sure you can guess, however, is the same.
But, Nothing's cooler than having to tell your friends you can't meet them in THAT parking lot because you might "scuff" your front end because it's like so low and therefore you're like so cool and stuff.
O.K., you're right...I am an idiot.