The closest I could find at
New Car Prices and Used Car Book Values - NADAguides is a '98 in my ZIP area. Mid book is $3575 and the high-low spread is small. What value do you hope to preserve?
Quote:
So basically there really isn't a way to do a kammback or boat tail with a sedan like there is with a hatchback or a wagon without completely modifying the car?
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"So, what you're saying is..."
For certain values of 'modifying the car' — YES. You're trying to modify the preformance envelope without modifying the engineering.
However if you allow removing the trunk lid, tail lights and back bumper and storing them in a clean, dry place then the story changes...
Bolt the outer corners of the box cavity to the sockets for the tail light housings and run flying buttresses to the roof, like a Ford GT40. And what
XKCD/37 would call a big *ss-diffuser:
https://scontent.cdninstagram.com/t5...Mjg0NA%3D%3D.2