P&S only made one version, what is so different about yours?
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Some dragster guys use to cut down the bushings flat to the top of the spindle to run solid flat arms and caps, and the heavier F/C ran the full bushings with holes in the arms. are they stamped P&S?? Rebushed many a P&S (old and new) when TAK (P&S) was around and they were all the same kit/bushings