which ignition?

Im currently putting my 70 swinger back together. it had points and a /6 in it. It now sports a magnum v8 and i do have a electronic distributor. what should i go with. I see some people going with electronic, or Hei, etc.

I have an orange box with a engine harness that is in my parts bin that i would have to unwrap to get to the electronic ignition plug and wires.

whats the reliability of the HEI or one of those ebay HEI distributors.

Tom