I did some reading on other forums and they said that they will work on the street as long as they are kept cool and a mild coil is used. I'm just going to go with the 6 for simplicity and as you said, the program for the original 7 might not be available. The 6 has everything I need, the data logging on the 7 would be nice though. It was very difficult to find any information on the original digital 7 since it is such an old ignition.