Solid roller lifters...

Might be worth reading:

What size Oil Restrictor

I’m waiting for a report from a customer who’s trying some BAM lifters in an unbushed OE block.

There are a few positions where the small feed hole for the pushrod oiling starts to get exposed when the lifter is at full lift.
He’s going to let me know how bad that situation is when he’s able to prime the oil system.