Lifters don't "oil" per se.

They have a hole in the cup to let oil out of the lifter where it then goes where it's directed by the hollow push rod. All the oil comes from the oil pump thru the lifter gallery.

One is as good as another IMHO.

The only difference between lifters might be the size of the hole but I doubt a few thou will make much difference.

You really need to find a machinist that isn't a hack to fix the problem. If you stick the cam to that bearing and it does more than turn a little, your numbers block could be toast.

Kevin