Trying to work all the bugs out of my newly installed 408. In addition to the charge issue I also have a misfire (pops out the exhaust and breaks up) once the motor gets to approx 5K rpms. I was wondering if I am not getting enough voltage to the orange box if that could be a cause of the misfire?

Working through the weekend so trying to get ideas to start trouble shooting. Timing, fuel pressure under load(I have 9 lbs at the rail per the gauge at idle), igition are all on the list to check but was thinking that the two problems maybe related. Also going to poke around with the volt meter.

Thanks