I have B3, B4, B44, and 210 cars. I compared all of the arms on their own against each other. The kingpins all line up exactly. The shock mount locations are even in the same relative places. If you measured along the 210 arm itself you'll get an artificially longer number due to the angled nature of the arms. The B3 had the same offset wheels. The B2 didn't but then again it also didn't have the same length arms.
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