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Apparently Volvo do/did stock two or three lengths of control arms for caster adjustment...or maybe that's urban legend?
Bob, this probably relates to the different available (?) lengths of Control Arm Stays, i.e. the "radius rods that angle back from the bottom of the control arm. I think these would mainly affect caster.
The Volvo Parts Web Store lists 3 different Control Arm Stays. I don't have any info on length selection criteria except for the reference to "brake vibrations for the 388.5 mm rod.
Standard length=390.5 mm $62.62 3530789
388.5 mm Service version for cars with brake vibrations. $53.68 6819079
Not standard equipment, service alternative.
385 mm $62.62 3530790
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Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.
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