My concern would be fitment. This is why I chose a fiberglass rear decklid. (The front hood I crafted from aluminum).
I know each car is a little different. Getting a good fitment of the fiberglass decklid took a lot of work.
Here you can see the poor fitment and the work to get it to fit properly:
http://www.rc-tech.net/pantera1/decklid/dl.htm
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