383 Crankshaft Bearing Clearance Question

Thanks for the info. On a hunch, I called Federal Mogul and talked to a tech guy. He gave me the spec shell thickness, and we went and miked all the shells, and lo and behold they all came out almost .001 thin. So we got Summit to take a defective return and they're sending us a new set. We'll mike those shells when we get them, and if they're closer to spec we'll install them and try again with the plastigage...... FYI, Federal Mogul says the clearance range for these bearings is .0008 to .0033.