They still leak. Tube it and be done. I’m not sure why the tube is such a big deal. Just like it’s now all the rage to use SF lifters with the hole in them. Never seen a need for it, but the tube is a big deal.
If you want to run pushrod oiling (can’t think of a single reason to do it) you can still tube the block. Just drill a .040 or so hole in the tube where it breaks through the lifter bore and restrict the drivers side with a set screw and a .125 hole.
