Another lifter noise question

This is a tough one. I know a few members here have had lifter failures at times, but since you've replaced them along with the cam and rockers, it would be some coincidence to still have this problem.

First, bare with me :), but I have to ask about oil pressure. How is it at idle, and how does it react with rpm?

Second, are you positive it's valvetrain noise? Is it random across both banks, or has it been located in one specific area over the course of the changes?