Don't really recommend heims for lots of miles. My fronts on the link arms are loose after about a year, I had steering linkage that needed a stabilizer within about 3K miles, so overall, I think another kind of joint is best for a lot of driving. I like the idea of the urethane sphericals, since they're greasable and rebuildable for pretty cheap. I don't think anyone builds a urethane spherical end for a 3/4" bolt, if I find one I'll probably look at replacing some of my links ends with them.