Just curious, when you changed the oil, ( You did do this right?). Did it have any leftover grit from the dead cam? Any glitter? Oil pump screen may be clogged up from trash in oil pan, If thats the case the pump is a dead player too... Consensus of Rod bearing?? Did it knock??
I say drain the oil again, look at it closely and if you can, cut open the oil filter, If there is more grit in there then It.s gonna need at least the pan off for a closer look. Good Luck, I always have that same thing happen to me on my "good deals that I cant say no too" Good Luck keep us posted...