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. In a perfect world everything gets put back exactly like it was. We all know that. But life happens... I guess I wuz a MoRon and didn't think about the crank still being held in place - during an in-frame rebuild. Like a big dummy, I saw a main cap. Then I saw the same picture oriented like...

. I don't think - just my opinion - that replacing half or only the "upper" and "lower" on one journal isn't going to be any better than getting half of a bearing set installed wrong. You should be able to bolt the main back in place, then look - maybe even with a mirror to see the wear...

. Agreed! Magnifying glass... You should be able to match the wear pattern. Put it together, look, then try it the other way. With some magnification you should be able to figure out proper orientation.

. IMO, you need need to carefully inspect that crank journal. Does it have a scratch or scuff mark that is chewing into that bearing? Or, maybe more specific two spots? Possible that it has already been scuffed off by the bearing... Plasti should read the scuff if you can find it. Funny how...

. It doesn't look new. More like a factory defect. Doesn't look bad to me - unless you wanted to "go new" while you are down that far into the rebuild.

. Used to be that hitting those piston tops (NOT in the ring lands!) with a bead blaster was a good thing... Cleanliness is next to godliness in motor repairs.

. Could be an inexpensive short term valve guide fix. Thinking about small block Chevrolet heads that had "umbrella seals" inside the valve springs on the stock version of those cars. Primary job that they did was to keep the splash of oil from running down the valve stems - causing the oil...

. AND sometimes you just have to do it because it needs to be done with the tools you have. Before I had a gantry, I used a tree. Before I had a chain-fall, I used a come-along. Before I had an electric chain-fall, I used the manual version of that tool. Used to have a hodge-podge box of...

. I dunno... It almost seems like replacing all is the way to go when you are that deep into the engine. You know, new bearings everywhere, new sleeves, full set of pistons. Then again too - that is how it is supposed to be done - at a reasonable cost. Replace just the cracked parts maybe...