I have made a couple of statements about this situation , and I race a couple of Hemi a-bodies aka Hemi Dart / Hemi Cuda. I stopped in to see John and Ben Holt of Holt Race Cars and asked them if I need to start thinking about diapers for my 2 cars. What John told me is that none of the ss/ah cars are required to have them and how would you seal up around the hole in the pan where the steering goes through? They have built a few of the high end ss/ah racers and should know what's going on , I would say. NHRA tech guy will be there Thursday , and John will shoot the question to him.