Varied Lifter Bore Oil Holes

I got to looking at a 340 block and a 360 block and saw some significant variations in the oil holes where the lifters intersect the oil galleries. The 360 was pretty consistent side-to-side, and was fairly close to the hole size on the passenger side of the 340. (1st pix is the smallest hole on the passenger side, 340 block.) But the 340's driver's side holes were a lot bigger. (2nd pix is the largest hole on the driver's side, 340 block.)

So any cause for concern or to do any mods? The lifters bores are tight as a tick... in fact, we had to ask Crane to replace 3 of the lifters that were up around .905" OD and would not readily slip in. So, I can't see that we will have any excess leakage out of any of the bores. And, the larger holes are on the driver's side, which is the lower pressure side. Plus, the smallest hole overlaps the oiling band in the lifter by about half the diameter of the oil hole when on the cam heel, so that SEEMS OK .

Any experienced comments appreciated.