It was originally done on some of the drag cars back in the late '70's, I forget which class but the caveat was that they were basically lowered onto the bump stops and had almost no useable suspension travel, which limits the impact of the terrible Ackerman angles that are caused by flipping the ball joints to get the front steer.
The steering geometry that results is TERRIBLE. Which is why the rack and pinion conversions that work pretty much all use tubular K members and different spindles. There is no cheap easy way to add a front steer rack on a Mopar with a stock K that doesn't result in abysmal steering geometry. If there was, you'd see it all the time. It was a drag car thing for awhile, but Ackerman is also only an issue when you turn the wheels, so, what you can get away with on a drag only car is significantly different than what you can get away with on a street car.
I'm not sure how many people that have successfully done it are still around. brian6pac did it on one of his drag cars, but he cut and welded the steering arms on the lower ball joints to improve the Ackerman. He's also no longer with us. I took quick look at some of the threads where it was talked about, most of the guys that said they did it haven't been around for years.
Best of luck!
