2005 Dodge Ram 2500 5.9L manual transmission: Crank no start

I have crank no start on my truck after I had the engine rebuilt and haven't been able to break it in. It started with a P2146 and P0336 codes which were a bad crank position sensor and pinched injector harness under the rocker cover. It has evolved into my ECM has been repaired twice by AutoComputerSpecialist for shorted injector drivers. The first time was months after the wiring issues were fixed, and then after no DTC's I put it in the truck and still crank no start. When I sent it back to be checked they found the injector drivers shorted again. All injector wires from ECM to the injectors have 0.3-0.4 Ohms resistance, or .007-.011 mV drop. All fused B(+) from battery show 12.6 volts, all Ground wires were confirmed from the ECM to ground. I had 4.96 V on one 5 volt supply wire, but I traced that to come from my engine brake controller the runs a jumper harness to the crank position sensor, but I now have unplugged that. It's not a fuel issue, I have 5,000-8,000 psi on the rail cranking, and the set pressure is 4000-7000psi, brand new Bosch injectors not Remans, and the solenoids all had 0.6 Ohms. Nothing else gives me an indication for something wrong, no DTC's, all my lights and gauges work, door locks, windows, etc. I'm afraid of plugging the ECM back in because I can't find anything that looks like an issue, or were the injector drivers shorted only when I tried to crank, but not when key is turned on. I don't have a scope to work with only been using a probe, multimeter, and a Snap-on Solus Ultra I can borrow from time to time. Just found Scanner Danner the past week and been diving in because all the diesel mechanics in my area are stumped on this issue. I'm considering trying my ECM on a 04 Dodge Ram with a 5.9 to confirm it's not an internal short. I ignorantly spent a long time cranking on that starter after I fixed the injector harness, and my codes all went away under the impression it was a fuel issue. Any help or guidance you guys can give will be a blessing!         I'll attach the Service Manual I've been using for this process below if that helps for referance.

I won't be much help on the diesel driveability end of things, but when you pulled the harness out from the valve cover, did wires get broken, shorted together or shorted to ground?
You can ohm check a wire from one end to the other, but you will get the same measurement if that wire is shorted to ground, shorted to another wire or perfectly intact.

The wires were smashed by the rocker cover, and shorted to ground. I don’t know much about these computers, concerned there’s a voltage regulating problem causing the injector drivers to short out. There’s another 2005 dodge Cummins with a manual that I could try my computer on to confirm whether it’s an internal computer issue that has been missed when it was repaired, or not. If it works on that truck I really have no idea where to dig back looking for an issue.