i have a 1984 rx7 gs with a 12a, the primarys are streetported, and the secondarys are bridgeported. i recently got 2 msd 6a`s that i want to install, but am not sure how to do this, does anyone have a diagram or some tips on how to do this, any advice or help would be greatly appreciated

 

Check out this diagram even though it shows 3 6al MSD boxes it is basicaly the same thing that I believe you are trying to do. https://www.rx7club.com/1st-generation-specific-1979-1985-18/direct-ignition-advise-898681/

 

im not running direct on the leading, i just want to keep the 2 coils, im just not sure how to hook them to the igniters