So I plan going with ITBs for my m20 sometime in the near future (if all goes well). Browsing around online I found this kit. This looks extremely promising. They also have just the engine harness and ecu (case anyone was for looking for new harness because the OE stuff is NLA). I think I'm going to order this harness and ecu from them soon. Hopefully this will eliminate any electrical gremlins an old 30+ year old wiring can have.

Don't quote me on this, but I believe this harness can be made to work with the OE DME as well. If you ask them.

https://reduxracing.com/collections/...5695f4d2&_ss=c Click image for larger version Name: Harness.png Views: 0 Size: 179.4 KB ID: 10087391