Oversized thrust bearing
Be careful what you read into this IMHO: King says elsewhere that they only make them for certain applications so no they are not available for all apps; don't expect to find them in a 'mix and match' configuration for every app. If you go into the current King catalog, it shows them for things like Chevy 350 in .010, .020 and .030. wider flange for certain undersizes, but not for the 360 unless it is in the .060 undersize, and then it is only .010 wider. If anyone actually calls King on the 360 thrust oversize matter, I am sure we'd all like to hear the outcome.