Hemi swap 6.1L Turnover, Pause Start Issue

I was focusing on the list of codes that he listed. The computer will spit out high circuit codes, if the low reference doesn't change. IF it were on only 1 item, I would focus on that 1 item, but he listed many items with a high circuit code. Again it's normal diagnosing to check power's,grounds, etc. So it could be something else like an IGN switch causing these issues. Usually when a power source is missing, blown fuse,circuit(wire) has been cut, or connector unplugged, a high voltage code will set because the computer is looking for a change on the reference signal(wire) which is already high and doesn't change unless there is a fused source voltage on the other end and some type of component such as an O2 sensor, fuel level sensor, etc. that uses the available source voltage and sends a signal on the reference signal circuit back to computer that is monitoring the sensors. Sounds confusing. Sounds wrong to say "high" when a fuse is blown, but that's the way GM did it.