You don’t want any type of ballast with any msd coil unless specified by msd. You may have just gotten lucky with the blaster 2 coil. I looked on msd site, the blaster 2 and 3 have the same number of coil turns. Maybe the 2 is an older model and truely has a different number of turns, maybe not. Either way, shitcan or bypass the ballast for testing and set total timing to 33-35 and let us know