67 twin turbo dart

That's the thing I just have what they sent to go off of. I haven't and they probably haven't either. What's your coil dwell set to? I'll have them see if changing the input capture to falling edge makes any difference
@Hemirunner not sure which cooper plugs they put in as far as heat range. Think the 3.5/1 ms is what megasquirt recommended, be interesting to see what others have their set to.

My running coil dwell is the same as what you have. I do have a different cranking dwell, but that's irrelevant while its running.