Choice for EDM solid flat tappet lifter.

I realize that. My argument was, that no matter what he DOES he cannot make any slant 6 lifter ACT as an edm lifter, since there is no pressure there.

The only exception would be for a hydraulic lifter slant 6. There is "pressure" there, although minimal, since they are oiled "backwards" through the head, through the rocker shaft, through the rockers, through the pushrods and FINALLY the lifter gets it. Can you IMAGINE the pressure drop when it finally gets to the lifters? It's no wonder the hydraulic lifter slant 6 engines had trouble with ticking and non working lifters. It was just not a good idea for them.