360 LA Main Bearing Oil Holes Look Funny?

So the oiling holes come in at an angle but they do not intersect close enough 'to the bearing oil hole' on a lot of blocks and so they put a counter bore so that they all feed into that little 'bathtub' is what I call it..and through the bearings oil hole un obstructed. There are a few runs of blocks out there they do not have these countersunk bathtubs joining the main and cam feeds , those engines have oiling problems because there is nothing lining up with the main bearing oil hole 'it lines up over the intersection of those holes partially blocking half of each' ..the remedy is to slot the hole on the bearing, dress it , clean it and install it.
1967- 1970 340 engines 'luck of the draw' are ones I've seen with this issue. Fwiw