Hi Rick. Yes, a car that is a natural E car can run D and F legally. Is your Olds similar to the Stephenson family's car? It's killer fast, holds the DF/S NHRA record at 14.72. Pics can be found at
http://www.autoimagery.com/store/cgi...ole+Stephenson
Mine is a .422 cam. I bought my car from Tom Kasch in Ohio in 2006 (Stephenson's Olds is a former Kasch car as well). It's a neat car, power everything, even seats. All leather interior and a sunroof to boot. Both the car and myself need to go on a diet (myself more so LOL), as it weighs about 3500 pounds, a hundred over the DF/S-EF/SA minimum weight.