My take on the oiling system crossover tube for the small block

Duane said
Agreed but if you go back and read the old Chrysler engine book,
at the time it was written there was plenty of roller lifters on the market at the time with an oil band cut out just like in the video, and Chrysler recommended to tube or bush the block to prevent low oil pressure with this type of lifter as well.

Yep. Dogbone style lifters with enough lobe lift to get it out of the hole and expose the undercut. I bush the bores and use solid body lifters. Fixed.