A tree is not immovable, 3500+ lbs hunk of steel traveling anywhere near the reported speed would knock over alot of trees (they didn't say how big the tree was did they?). Me step brother hit a tree at a off angle similar to that car with a 71' Nova at like 60-70 mph and the tree (which was pretty good sized) was no longer standing, and the car in was two pieces while he survived with no serious injuries
I was a part of the Riverside team when that car was built. It was totally a one-off and there was never plans for any other one to be built, or for the car to run more than one to 2 seasons. GM paid to have the car built as a test mule to take to the wind tunnel (which they did twice) to gain data for development of the Lumina, and it was OK'd for use only in ARCA and never to be used on the superspeedways, only on the midsized tracks (wasn't stable enough to run those tracks anyway). The car was areodynamically superior to the other cars at the time, and was fast on it's own, but was very unstable around other cars due to the short trunk lid. I don't think the car ran more than a half dozen times or so before getting destroyed in a wreck at Atlanta in which the driver of the other car involved was killed.