Until you measure the endplay you're just guessing as to whether anything's actually wrong with the thrust bearing. Simply knowing its "ugly" isn't going to help us help you. Maybe the last man in there put it up against his disc sander. Put the shells back in the block, drop the crank in and tighten up the thrust saddle. Stick a feeler gauge in there and work the crank back and forth until you get a measurement. It should be around .006. If it's not, tell us.
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