2005 Toyota Avalon Spark Plug Replacement

My wife and I have a 2005 Toyota Avalon XL with the 3.5L V-6 engine. It’s coming up on 11 years old and only has about 89,000 miles and it’s coming up time to replace the spark plugs. I think the Scheduled Maintenance booklet says 120,000 miles is the target to replace them but I misplaced the book. From the pdf FSM, I have to remove the intake surge take to get to the bank #2 plugs. Anything else I should be aware of and is the interval 90,000 miles or 120,000 miles? The car runs fine and no trouble codes are showing. Thanks very much!