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Flange-3 Rough and uneven thickness and concentric.


My backup engine has a 440source kit, 4.250" stroke RB crank, so I checked my crank flange. The finish looks smooth and the TIR on the flange OD was 0.001" measured in the block with used "mockup" bearings.

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Unfinished rod journal.-1


I see the journal surface is finished, but the lightening hole isn't all the way though the full dia. How far is the full dia hole? I don't see any problem with that, just not pretty. On mine, only the 5-6 rod journal hole wasn't drilled all the way though, the tip of the drill broke thru and left a round hole about 0.25" dia, so it almost made it.

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Radius interference,main bearing-2


What bearings are you using? And what is the bearing total width? Since I have RB mains, I am using Clevite MS-1277HG bearings and the radius cleared. These bearings have a total width of 0.94" and at the chamfer (H) the width is about 0.84"-0.85"