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I would be leery of a diagnosis of oil leak from both valve covers .It's likely nothing more than the plug tubes I could see one side leaking but not both at the same time.
If I was going to remove both covers I would also do the cam chain pads . They wear a lot by 100,000 mi. on the 5 chain motors and the revised more durable parts are only about $20 per side.(mostly labour about 5-6 hrs ).
A clutch and IMS bearing and rear seal would be about $3k total about 1/2 that for parts
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