Where I work (automotive) it is said that a lower front helps the Cd of a car.
The side view of your car shows the opposite although it is not loaded.
That mod would make for a good WAF and should help aero.
What is the size of the rims ?
I seem to recall Citroen CX had flat stainless wheel covers that would not look too badly out of place (I guess they were 14").
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