Funny as many say the orange box is no good but mine has worked flawless since 2000 when I first put it on my boys Dart. I now run it on my 63 with an Acell coil. When we took it off his car and put MSD on it it did not sound any different and started the same. It also did not go any faster with the MSD. Sorry to hear so many have had trouble with them. Mine never misses a beat and the timing is right on all the time. Good enough for 6500 RPM and 10 second et's. Ron