Help on the tail of my Duster...

I recently put new quarter panels on my 71 Duster. I'm in a little bit of confussion now though. From the point of the tail to the edge of the lights are different in length on each side. I also have a Demon which is also different in length. It seems to be that the left side is longer by about a 1/4" on both cars. Is this normal, or are they both wrong, because I would assume that both side should be symetrical?

I might of confused you folks also, so i'll answer any questions.
Thanks-Naji

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