To be honest - I don't see this doing much more than bleeding out oil pressure because both lobes are splash fed more from the crank than anything else and the lifter is rotating, tossing the oil out from the mating surface anyway..
I can't help but wonder how many of the camshaft/lifter failures happened using the rod bearing shells without the squirt hole.. The squirt hole was to align with the cross drilled crank to get a straight shot of oil, timed, when the other end of the hole aligned with the cam bearing hole.. I was taught that was to squirt oil on the cylinder wall,, but I wonder how mucha the "overspray" would shoot at the cam lobes, and reduce the wear/failure,,.. just thinking out loud..
I've always used the squirt hole shell,, even if I have to mod the shells myself.. and never had a failure.. fwiw