I have a Hybrid setup on my Plymouth. I used a standard Mopar electronic distributor, purchased on ebay new $70. I use a MSD high vibration coil $50 and a HEI module $40
Here is a link to how wire it up. http://duster318.freeservers.com/tech/hei.html
I had both a 360 and a 440 that I could put in my 65 Dart 4 speed car, both small and big block eddy heads. When I added up all the cost it was an easy choice. The 440 is going in the car with a 440 Source 512 stroker kit. The 360/408 has been sold.
Talked to you on the phone the other day about the 318 I have. I'm just about ready to give the thing away, so if you want it give me a call or PM. It may be better than what you've got.