Are you implying that it would have been survivable if you hit the culvert in a gbody ?
I hit one when living in Florida with my 74 GP....put my car in the ditch and hit a culvert. I was told the car went about 15 feet in the air, did a 360 airborne and bent all the cragar protects when it landed. I woke up when the paramedics were pushing me back into the car on the passenger side. I have no seatbelt on and got tossed to the passenger side and out through the windshield. My right leg was trapped in the center console under the dash keeping me from flying any further. Don't remember much about the accident except for when the paramedics were dealing with me...the guys who new me and saw my car thought I was dead...but I survived...😀