Wiper arms, wiper transmission & pawl assembly, as well as wiper motor & wiper switch are different for '68-72 A-body non concealed wipers in comparison to concealed wiper A-body counterparts. Wiper arms are same on non concealed wiper setups, left & right. Concealed '68-72 A-body wipers had a different wiper arm for each side.
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Buzzards gotta eat... same as worms.
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