John,

I converted our A-4 to Indigo Electronics' System.

I have been very happy with it!

It's a little more expensive than the "Ignitor" system but it includes a lot more things, such as, new spark plugs, new spark plug wires, new distributor cap, new rotor, new coil, new advance weight springs, plus the electronic ignition parts!

It's a good deal! Go for it!

http://www.atomic4.com/index.html

All of Indigo's Kits are great. I've installed, the Crankcase Ventilation, Oil Filter, and Oil Cooler Kits, as well as the Electronic Ignition. Happy with them all.

Good Luck,
Steve Kaminsky

P.S. I am not connect with Indigo Electronics in anyway!