Any one interested in the oiling mods I did?

gregcon said

The sketch doesnt show the lifters or cam bearings as they are of no consequence to the issue of flow difference across branches.

Most high end SBM engines I see use a dry sump or belt driven external pump.

Click to expand...

I ran a grooved journal camshaft in my last engine. I did not restrict oil going to the rockers. This failed the 2&4 main bearings.
The other aspects of the engine effect the others. Too much of the main feed oil went to the heads. I do not know how to get it across to you that just because you have pressure, does not mean all components have the necessary volume to function properly.
The drawing you posted will work because it is drastically simplified.
It is not a drawing of a real engine oiling system.