It's a legitimate question. From the back a nicely finished tank that is visible below the rear bumper can really add to the look. If not seen, then whatever.
A silver grey colour, black straps, detailed diff and cover, good shocks with matching bolts with a nicely finished aluminized exhaust works for me.
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67 Grande Parisienne 4 door HT. 69 Parisienne Convertible.