Cam/Head Swap Disaster.......

It ran strong for 45 seconds and was a fresh engine before cam issue. To be honest, the water issue is secondary to the high pressure blowing out the oil filter. And actually, I did pull the oil pump and put a new/used one on since I found some bits of cam in the pump. Could a relieve valve spring on the pump cause this sort of problem? Thanks

No it's not secondary. It's most likely the same issue. If water and oil occupy the same space at the same time in the oiling system, the pressure will go up. Water cannot be compressed. Oil has some compressability (is that even a word?) compared to water.