If you're able to, get up under there and take some pics of the actual control arms, shocks, and springs. If it's really dirty under there, then try to wipe off these parts and look for part #'s on any of these components as well as possible brand name(s). From the pics that you posted, it's impossible to tell exactly what's what up under there. Also if you can get some pics of the rear and especially the front-end... things like track-bars, drag-link, tie-rod, brake-lines, etc... that would be very helpful.
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