[rattus]

Take a look at pro-touring.com

There's lots of info on tubular upper and lower control arms.

Several companies are now making tubular control arms for the 1st gen f-body: Hotchkis, BMR, Global West, Detroit Speed & Engineering, Speedtech, SPC. Usually people don't use tubular lowers because they don't improve suspension geometry (except for DSE lowers which add some positive caster). Only some of the uppers add positive caster, e.g. Global West, DSE, but they all make it easier to do the Guldstrand mod (because you don't have to "dog ear" the upper control arm mount to clear stock upper control arms).

I use DSE lowers (mainly for the added strength vs. stock lowers) and SPC uppers. The SPC upper control arms are adjustable (you don't have to use shims to set camber/caster and camber/caster can be adjusted independently to a much larger range than non-adjustable control arms). Savitske Classic & Custom offers a front suspension kit that bundles the SPC adjustable upper control arms with tall ball joints (that improve camber gain w/ or w/out the Guldstrand Mod) and tall stud tie rod ends which improves bump steer. Its a pretty slick setup for not much more $ than many companies charge for just upper control arms (that offer little or no improvement in suspension geometry).