GM 8 PIN HEI RELAY?

Thanks for the replies. I am not very familiar with the gm 4-pin or 8-pin modules conversion. But, from what I have read it is reliable. Due to the fact that the conversion is based on easy to find and replace parts is why I am going this direction. Where I live on the Olympic peninsula auto parts are hard to come by when your car dies in the middle of nowhere, especially aftermarket. I have used the analog MSD 6200 boxes for years, primarily on VW based off-road cars with few problems, when they die it's game over unless you have a spare. I have owned Mopars for 45 years and the factory ignition module besides not being HEI, is junk and fails.

My68barracuda thanks for the links and info. My biggest problem is that I rebuilt the wiring harness from the firewall forward and don't want to open that "can of worms" again. My problem with all of the information is how many variations there are. Classic "more than one way to skin a cat". I am just relying on other peoples experience of what they did and why. That is the reason of my question about the relay, which appears that it is no needed.