Mark,
The current billet aluminum offerings from PIM & Precision Proformance (Byers) appear similar in design and use a screw in 4 bar rod end at the chassis end, thus if you don't mind the suspension transmitting a bit more road feel then you could swap those to heim joints (or find narrower 4 bar ends). The heims are much narrower and therefore you could space them to gain caster. If you do both top and bottom (top spaced rearward, bottom spaced forward) I'd bet you get all of the caster that a modified steel a-arm provides.
Julian
Julian
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