My take on the oiling system crossover tube for the small block

Duane said

Are you talking about the feeds to the cam bearings from the saddles
Or just blocking the passage in number 1 main.
You do not need carbide.

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I'm talking about the cam bearing feeds. I used carbine because they were available. I snapped the first one. Then I slowed down on the second and just dulled it and every other bit I tried just was useless.