Because the lower A-arms are weight bearing, they tend to transfer more road noise to the chassis than the uppers, so you need to be very cautious about bushing use. Steel lower bushings are available from many circle-track supply houses, but every set I've examined were made to very loose tolerances (rattle-rattle). Howe Precision Series greaseable steel lowers, which use similar technology to their revolutionary ball joints, are an exception to the rule. They are lash-adjustable and lubed internally via greaseable bolts. They require some fitting and welding to install, and they only fit stock arms, but they're an interesting application of new design features. They are also not sealed against dirt or moisture so they're not recommended for street cars.
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