408 valve train noise
Oh.
I don't know if Magnums have that problem - maybe they do, and I'll be checking when I put my Victor on in a couple of weeks.
The lifter bores in a standard 360 are shorter than a Magnum, so that *might* only be a worry for blocks that are retrofitting hydraulic rollers.
Certainly, when I called hughes about my noisy valvetrain, spoke to Dave, he didn't mention lifter bores. He said "Call comp, its their cam that's making all the noise" LOL.
Steve