with sticking to matched components. go with the blaster, i would recommend getting this one - http://www.msdignition.com/Products/Coils/Race/8222_-_High_Vibration_Blaster_Coil.aspx - which i will be moving over to. they also fit nicely in the 6-pac coil mount bracket . once you switch your ECU over to MSD you can also safely toss your ballast resistor.