No tach or oil pressure  (98.5 24 valve automatic)

Looking for some help with diagnosing why the tach and oil pressure gauge aren’t getting signal. Gauges have been tested and work fine. I’ve installed a mechanical oil pressure gauge and it shows good pressure. I have RPM’s within range. Was a good running & driving pickup but had a cracked 53 block. I had a mechanic build me a new engine. He used a 2004 5.9 common rail block with my original VP head. Long story short he went out of business and I ended up getting the truck back unfinished. I installed the factory cam and cam gear and gear case and mounted the factory reluctor ring in front of the balancer. Multiple ecm’s and pcm’s later I finally have the engine starting and running fine but I’ve got no tach and no oil pressure gauge. Once in a while the tach will work for a couple seconds then fall out and the check engine light come’s on for cam position sensor and oil pressure. Live data on scan tool shows good rpm’s. Gone through all the sensor grounds and 5 volt signals and they are all fine. I have done the W-T ground mod and added other grounds to the pcm and battery to frame. I’ve gone through multiple Cummins crank and cam sensors and there is no difference. I’ve made sure the missing tooth on the crank reluctor ring is in the factory TDC location and the notch in the cam gear is visible through the sensor hole in the timing cover. The two grounds on the block used for sensor ground on the ecm are both good. I’ve got 5 volt signals on all my sensors going back to the ecm also. What am I overlooking?