What’s the COO of the new pump? How’s the drive belt and tensioner on that engine? Some serpentine belts don’t yield to tension and some tensioners are aggressive with tension. I replace timing belt driven ones out of PM.
FWIW, I installed a defective German Motorcraft pump on a friend’s truck. I had to install a Chinese parts store pump, I had no choice(or Mexican “reman”). About 8 years later, it’s still working to my surprise but I’m monitoring the situation on it.