Bought a 158k mile junkyard L33 to swap into my E36 M3 a few months ago.

Now, I realize I did this backwards, but I just finished pulling the heads and replacing the head gaskets with new factory pieces, and adding ARB head bolts. All was good minus a lot of carbon buildup. My mechanic friend (not familiar with LS stuff) suggested I pull the main and rod bearings one at a time for inspection. I'm not opposed to the idea, but it seems to be a good bit more complicated than pulling bearing caps like I've done in the past (Jeep 4.0's and a 5.9).

This leads me to a couple of questions:

-Is it worth doing? I've done some google homework and I've seen everything from absolutely to no way.
-I've seen several mentions of "disturbing" the bearings and how they go back together, especially on the rods, due to their design. I understand how and why the rods go together like they do. What exactly are people referring to in reference to "disturbing"?
-Is it as simple as pulling apart one at a time, then following normal assembly procedures? I have a torque wrench that will show torque angle, so I'm not really worried about that aspect. Anything I'm missing?

 

So checking the bottom end was a good call, this is the pitting/scratches that were on the bottom of the #1 main.

 

Good thing you caught it now... it never hurts to check the cam bearings too.