The rear main cap is original, it has never been changed. All caps are original. I am not sure what exactly the rear main bearing alignment looked like before I took the engine apart. I basically just pulled the caps...and did a quick look at the bearings. I did not look at the bearing alignment. I learned my lesson and next time , I will check these things closer...and keep ALL parts. The engine was running ok and had good oil pressure before I took it apart, though it had high mileage. I am wondering how could align boring/honing the block affect the rear main bearing shell alignment? The machinst only took off a few thou from the caps (I believe .002 or .003?, I will confirm the exact amount), so not sure how that could affect the bearing alignment a lot. It almost looks like the bearing tab/cutout in the rear main cap is off...the block or bottom rear main bearing shell looks to be aligned properly...the cap bearing shell appears to be sitting forward approx 1/16".
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