Solid lifers now? hole in them ? where

Strange isn't it? The lifters of yesteryear never needed 'holes' & lasted just fine......
If it was my engine.....
Find some 25+ yr old lifters & use them; if used, have them re-faced.
I routinely grind a groove down the side of the lifter for extra lube using a Dremel. Does it do any thing? Doubt it, have always thought that the lifters get plenty of oil.....but the groove cannot do any harm.