what u do is, take the plug that goes to the stock coil and:

1. connect the yellow and the blk/yel wire together and connect that to the thin red wire on the MSD, that should be the switched 12v source wire
2. connect the green wire to the trigger wire of the MSD, I think its white wire
3. then hook up the power and gnd of the MSD to the battery
4. then hook up the new coil of ur choice to the orange and black wire

And your done. Good luck, let me know if u need anymore help.