Camshafts and Compression

fishmens67 said

as long as it's not close to the edge, centering the sweep is preferred.
running close to the edge can cause premature valve guide wear.

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Correct. But, a narrow sweep that isn’t centered will be far easier on the guides than a wide, centered sweep.

The centered sweep deal is over rated. If the roller isn’t running off the edge of the valve and it’s .040 wide it won’t wear the guides.