Roller cam and lifters question

If I were to go to a roller cam, I have heard the Bamm lifters are nice pieces.
My lifter bores are bushed. They drilled holes in the bushings to facilitate oiling.
I was told the other day that they recommend welding shut the oil hole in the Bamm lifters in order to run them with what I have going on.
Hadn’t ever heard of doing that before. He said not doing it creates excess windage.
Thoughts on that. Was told they do this mod to all the Mopar small blocks setup like mine