Chicken or the Egg?

Similar designs, Which came first? [caption id="attachment_483" align="alignnone" width="600" caption="Toyota Chaser/Mark 2"]Toyota Chaser/Mark 2[/caption] [caption id="attachment_485" align="alignnone" width="600" caption="3rd gen Chevy Monte Carlo"]3rd gen Chevy Monte Carlo[/caption]

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