The factory rear-steer system has the tie rod ends inboard of lower ball joints, this is how the correct Ackerman angle is generated. If you install a front steer system with the tie rod ends inboard of the lower ball joints you get the Ackerman angle disaster that people are talking about. It seems this is a right of passage for those who don't think it out ahead of time.
On related topic, have you ever noticed how on A-bodies the camber goes negative when the front end lifts? This is because the lower control arms are so much longer than the uppers. Using the Musty II steering knuckle requires an even shorter upper control arm. It sure does make it easy to buy off the shelf parts out of a catalog though. Eliminating the torsion bars allows a shorter lower control arm if someone is willing to look into that. A shorter lower control arm also makes it possible to decrease the wheel rate of the coil spring. This will make it easier to fit a drag race spring rate on a 10" shock in the space available.
Pretty things are for little girls, I want my stuff to work.