Super noisy valvetrain in my Magnum 5.9

Hey All:

The motor is slightly different than it was in the Durango. It's got a Comp Custom camshaft and these Iron Ram heads. However, I did measure the pushrod length and it was dead on at the stock length before I put it in the car.

The short block only has 50,000 miles supposedly. I did put lifters in it when I was putting it together, just for safety's sake, but I still have the stockers. The replacements I used then were sealed power. The ones I just replaced those with are Mopar. they look pretty well identical except the Mopars have the oil hole brushed purple so you know which side goes up.

Pushrods are Mopar Magnum replacements.

Fishy: You said you've gotten two sets of bad lifters before? Were they hydraulic rollers? Mopar or some other brand?

Does anyone know what the lifter preload on a Magnum is supposed to be for absolute certain?

I'll just go over everything again to make extra sure everything is as it should be.

Steve