Stand start on the left side of the overhang, far left of Pumping Huecos . Make a couple of moves right to gain the slot in the center of crack, this is the crux.
I watched a young Timy Fairfield make the FA of this one fine summer day about 1991-ish. At the time, I'd never seen anyone climb anything that difficult. It's also an excellent boulder problem straight up, without making the traverse right, and much easier.