Oil modifications.....why and how to.

We are carefully building our 360 and are closr to final assy of our block.

The "why" should be obvious....better oiling to your bearings should help preserve them in severe duty conditions.

The "how to".
Is this just a matter of enlarging oil passage ways?
All of them?
How much?
With what tool...drill bits?

Thank you for the continued assistance.