In 1974 I bought a 1970 Opel GT for $1800. Since I was a kid, it was my go to school and work car. One time my friends and I decided to see how many people we could put into the car - we got 5 of us in. I started modifying it. Added dual exhaust - which was a mistake - went back to single exhaust. Added a header and some spoilers and them some new custome wheels with BF Goodrich TA radials BR50x13. Wow were these wide. Added "racing" swaybars front and back. The swaybars were the best item to add. The Opel GT handled like a go cart after that. I also modified the body besides the spoilers. I hit a metal post protecting a traffic light one day when it was raining. The body shop decided that they couldn't fix the front end properly and that the lights would not flip up correctly after that. I was going to try to turbo charge the car, actually bought a turbo charger but never got up enough courage to do the work. I tried to sell it about 4 years later but no takers. I decided I was going to keep it and modify it some more, making the wheel wells larger - like the TransAm. I took the car apart and put everything away. I had the car up till two years ago. When I stripped the car, back in the late 1970's, even the paint, I found that the car had been in an accident or two. The driver's door - which was from another car, did not fit quite right at the top, and the passenger quarter panel was a pile of bondo. Anyways, I sold most of the parts on ebay and someone bought the shell for $600. whoever bought the parts got some real good parts.
Oh yeah, I remember my friend and I decided, one night, to go over this small bridge near a lake. The road leading up to the bridge was a long downhill slope - probably at least a 100' in elevation above the bridge. Well Opel GT's can fly. And we survived and the car did not seem to have any wear from the flite.