If you have a 6A box as well you better use a blaster 3.I had a problem with the blaster 2 arcing from the coil tower to the positive post.MSD said to use the blaster 3 with the taller tower and that would not happen.Worked great for many miles/years.
as of right now, im running the Super Stock Accel coil (i had it laying around) and a 6AL box and so far so good, but ive only put about 8 miles on them so far
I actually got away with a new,stock coil from Advance after we accidentally cracked the top of the Blaster 2.It(the stocker) worked fine,even on the bottle.
Frank....I highly recommend getting a 6AL box, but if you want a 6A, I have a spare setting here....I'll even put a warrantee on it....just send me some $$$.