Lemme add this: $10 heims might be a good idea for an initial build-up while you're trying to get the details of your geometry worked out. Just plan on replacing them after a couple of runs.
I AM using a pair of $10 5/8" heims on my front track bar. One day, after I get rich, I will replace them with some "real" heims. Although turning radius would suffer severely if my trackbar were to fail, it would not be a catastrophic event. I have $50 3/4" heims on my drag link and tie rod...it surely could be catastrophic if one of those failed.