I don't know if enyone posted this yet, i was searching on google and came across this thread on S14.net. i found it very interesting to see what people have come up with in way of making an adjustable rear control arm. i myself have thought fabing some up in the machine shop at my job, but i never have the time. maybe one day.....
but anyways, heres the link
http://www.s14.net/forums/showthread.php?t=30982