First it depends which super stock springs you are using, the old originals are pretty good, but the later ones sold by chrysler, made in mexico not so much. From my experience super stock spring work good until you get into the low tens. Cal Tracs, or similar designs, seem to be the most popular and I have seen them work very well with really fast cars well into the eights. I did a 4-link, as I could do the work myself, nothing beats the function of a fourlink coupled with good double adjustable shocks. The fourlinks only drawback maybe be the large range of adjustability, you can go down a rabbit hole if you do not understand how they work. Ladder bars work great if they are done right, only issue I have is that as you change the car as years go by, you may horsepower your way by the ladder bar sweet spot, then major fabrication may be involved to find it back, but the fourlink just find a new hole.