So they replaced the subframe and put back the old links on the right side but new ones on the left? Weaker parts side to side could cause you some problems when the suspension is loaded as going down the road at speed. There is nothing to "wear in" in the suspension. The parts are supposed to be tightened with the axle half shafts horizontal or the weight of the car on the suspension so they are tightened in their neutral/natural position where they will spend most of their time.

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Brian Toscano