Yes, you will need to lay a piece of plastigage on each journal. It should be used as confirmation that your on track with the bearings you ordered and any crank work that was done. Make sure its nice and straight along the journal axis. I did my mains at the same time and each rod one at a time. You need to make sure the is NO OIL on the journals when using plastigage. You will use the scale on the wrapper the plastigage comes in to measure its compressed thickness. The tolerances are in the FSM, but I set my engine up a little loose, running .0015" on the mains and .0018-.002" on the rods.
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