I’ve used a few Bill Mitchell aluminum blocks(from about 10 years ago)...... they all came with the lifter bores bushed.

I’ve only used one Indy block....... no bushings, no lifter oiling.
These blocks hold a lot of oil in the valley, and the lifters are submerged in oil.

I haven’t seen that motor since I built it, but it’s been running fine since 2011.

Comp 828-16’s(SB) and 829-16’s(BB) have no axle oiling.
Of course, “back in the day”, nothing else did either.