msd2 blaster.
 

Is it possible to install 3 msd2 blaster on my 13b?

and what Car?..FD?
I'd opt to go with a HKS Hi Power box.
is there any mods to the car ignition wise?

the simple answer is yes.

Well it doesn't have any msd ignition box just I have 3 coils. I have 2,hooked up in replacement of the Oem onces. But how do I install the third one. Is a 1983 Mazda rx7 with 13b Bridgeport engine

you will need to do a DLIDFIS conversion.

i'll probably regret asking, but since you apparently did not have DLIDFIS in mind, what got you so bent on using a third coil?

Idk it might be better? More spark? Is a 13b Bridgeport 6port. Carb

well most people seem to consider it a worthwhile mod. look it up and see if it's something you'd be interested in. there are several threads that detail the original as well as a few variations of it - with photos.