As far as the look, I guess that's up to you, it's your car. They are a safety thing I believe since the rear tail lights are not visible from the side like they are on most newer cars. 70 also has the side markers in the front. They dropped them in 71 because the front light is visible from the side.
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Hank
70 Chevelle SS396(454), M20, 3.73
My Chevelle
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