Thanks but not what I’m asking.I went to my old friend Mr. Google, and he came up with over 3 million hits on this subject. So somebody was trying to do it. One reference came right back to this forum.
AAR Fiberglass hood hinges
Most lift off hoods and deck lids are race weight. As such I don't think any feasible about of added material would be enough to support the hinged weight. Why not buy a bolt on hood?