408 valve train noise

pulled the intake this morning to see if I had installed lifters wrong and check on lifter bore. lifters are installed correctly and lifter oil hole is not exposed. I also just read the Hughes instructions that recommend .080 to .120 preload on lifters. I spoke with there tech guy when I assembled and he said max performance was with as little preload as possible. I have built many hydraulic flat tappet engines and always run 1/8 to 1/4 turn and they worked super. Just didn't make sense to even try that much preload. Gonna have to try. BUT when I inspected lifters there seemed to be a lot of scuffing on the bottom 1/2 of lifter that looked like too much angel pressure was on them also a couple of the lifter lobes showed signs of wear from the rollers at the start of the ramp. nose looked fine and base circle was fine just at the start of the lift.