You need the ECU box and the wiring harness that plugs into it to do the swap. You can buy just the harness from Mancini, and the ECU also. You would splice the blue wire into the ballast resistor hot/ on side of the ballast wiring. The harness comes with all of the instructions. A very easy swap. The distributor just plugs right in to the harness. Get yourself the harness and the ECU and it's a done deal. Of course you'll want to upgrade the alternator next, and the voltage regulator too to boost the juice to the ECU. The old alternator puts out minimal power for this upgrade. Good luck with your project, Geof