I went to Rt 66 dirt track to watch the team Demo Derby. Lots of car crunching! Most of the cars are 1970's big Ford LTD's and Mercs. A few Chevies and Mopars.
They also melted an 84 Subaru with a Jet Fuel car's flame! Was kinda scary with the sparks flying. The body was like aluminum foil, but the rear axle never warped.
