The guy that does my porting work had a 65 plymouth ht that would run 5.80 5.90's without a trace of a bar in the car. After he would make a pass sometimes you would have to help him get the drivers door open. He did have a helmet and jacket. Another car around here was a 67-68 mustang coupe with a stick and Cleveland small block, no roll bar. He went to the fun ford event here and ran a low 9. They escorted him off the property. Both of these cars were run around here 15 years ago. The mustang was a street racer that was driven to the event probably 30 miles. The plymouth was raced mostly on Friday nights at a local track grudge racing. Both had nos. not sure what the mustang had but the plymouth had two plates. He launched the car with one plate and hit the second plate down track. Pretty sure all the tracks are stricter these days.