Tim,
When I first saw your title line, thought you were going to talk about where firemen go to drink!! Okay, okay, this house painting is starting to get to me.

The bars you show should be considered "race only" pieces. The semi-circular area on the right upper portion of your photo is where it is intended to be welded to the axle housing tubes. The front pivot point looks to be set up for the standard urethane bushings that are typical to most rod control bars. The small end, as you likely already know, gets mounted in a "U" shaped bracket on the frame. The problem, for a street driven car, with these is lack of movement at the axle housing. Works for a race car because they only go straight, and they want some chassis jacking. In your street driven car you want some compliance. Stick with the four bar idea, pivoting at both ends. Besides, that tub wouldn't look right with the "Boy racer bars" hangin' underneath.