[Batman]

I don't think you'd see a difference without something over 402CI, a REALLY big cam or some sort of forced induction. Even then you are talking mostly reliability and consistency more then power gain. If I was going to a big hit of nitrous I would probably do it. If you are looking for something a little better check out the truck coils, they are slightly better then the car coils, but only marginally. To put it in perspective I am pushing over 500 engine HP with the stock coils with no issues of high RPM spark blow out.