Front Cam Bearing Orientation

[macdonge]

Hi all. Embarking on my first flathead rebuild ('39 Merc 239 c.i.) and need to know whether the large hole goes up or down on the front cam bearing. I'm aware that it must go up on the rear bearing. I found instructions in a Lincoln Mercury Overhaul Manual (for the 3rd gen engines) that said "Install the front cam bearing so that the larger of the two holes will be at the bottom.."

Thanks in advance for any advice on this.