I thought that was the problem also but this one is different. The car was driving fine all day yesterday and last month or so but last night while it was idling, it just died. I checked for the spark and no spark, I let the car sit for a minute, try again, cranked right up, than 10 sec later, died. It's not the coil or my MSD box because I was getting spark when I turn on the ignition and when I turn the ignition off. My starter turns everytime and my fuel pressure stays up.
I think it might be a bad connection on the tach signal wire (stock negative coil wire) and the MSD wire?? I'm going to try to by-pass it like you got and see if that helps. Thanks again Rick