I have a copy of an article on FE lubrication mods. They recommended drilling the
oil gallery from the pump to the filter housing (shown in the picture) I think from 5/16" to 3/8". I believe that was the only one they recommended making bigger, some were made smaller like adding a socket screw with a hole drilled in it for the hole from the valley that feeds the distributor gear. I'll try and dig up the article for you it had a few good tips. Mostly just aligning and deburring stuff like you're doing. The bearing holes you are aligning I think the book recommends drill bit sizes to check alignment and opening. I would say you're on track opening them to the hole (and whole) opening of the bearing.