If you run a great deal of anti squat the "parallel" 4 link will bind more quickly in roll but still slightly less than a converging 4 link with the same amount of anti squat. But even so we`re only dealing with maybe 3* of roll here and we`re not class racing these cars for a living. I haven`t worked with a drag race type 4 link yet that wouldn`t easily move through more than that with no noticable binding at all (unless it used a diag. track bar). So while it may seem like an issue on paper or the computer screen it`s not a problem in real life on a street car IMO. I prefer a good 3 link on a car intended for serious handling or we wouldn`t have built our own system but a decent parallel 4 link can still work pretty well. We`ve converted a couple former drag cars with 4 link into street cars intended to handle well with good results. The 4 link was the least of their problems.
Marcus SC&C