Did some more digging. Denso's website says torque spec is 15-22 ft-lb in an aluminum head or to do the 1/4-1/2 turn past contact if you don't have a torque wrench. FSM says 13 ft-lb. Denso also doesn't say to not use anti-seize like NGK. They just say to reduce torque spec by 30% if using anti-seize. So I think I might pull them all back out once I get this stuck one out, put a light coating of copper anti-seize on them, and reinstall to 9 ft-lb (109 in-lb). Wish I would have done all this digging before I installed them the first time and crushed all the washers but it probably doesn't matter that much.

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