who is running MRL (BAM) Lifters without lifter bore sleeves

Duane said
Tim just to add a bit more to your comments. Both of these lines are not my ideas. The one mod for full time oiling the rockers is straight from a Chrysler engineer in the stroker small block book.
His explanation is that in the stock system the path from the main galley to the rockers is too long.
If you try to increase the supply to the rockers by increasing supply
Through the 2&4 cam bearings you risk rod bearing failure. I know this first hand on my last build when I used grooved cam journals
Without any restrictions. I lost bearing crush in 2&4 main after 40 passes.
The other line is to avoid feeding the driver side galley from #1 main and starving the #1 main and the rod it feeds. This is well documented for many years by Chrysler.
I did not talk about oil timing because this is a valvetrain discussion
With some members having oil pressure issues.
The way I have done my valvetrain I am hoping for the best compromise of adequate oil pressure by restricting all the lifter bores to.030 feed, but still have a wet pressurized valvetrain.
But this would indirectly help the bottom end as well because these mods create a full priority main system or very close to it imho.

Evidently I need to get the book you are working from.

I get the circuitous route the oil goes to get to the rockers, but its essentially a constant flow system. Once the system has pressure there is flow through the system until some engineering problem crops up and the system can't overcome that.

That long route to the rockers is one reason why I don't like hot idle oil pressure to get below about 40 pounds. And the engineering of the system screams for a bit more oil pressure.

I've done dyno testing where a reduction of oil pressure was a loss of HP and all of it was at the rockers.

I need to read the book you are. I want to see what the book says. I understand what you are trying to gain. I even did an external feed to the rockers and until I corrected the oil timing to the rods, I kept killing bearings. Then I undid the the external feed to the rockers because it was a bit of a PITA and didn't have bearing or rocker issues.