By the way, one head has these large double stack washers under both valve springs, and the other one only has them under the intake valve springs.
I plan on changing valve springs but will I need to keep the large double stack washers?

Also, how do you remove these large double stack washers ? ? ? I tried magnets, air hose blast, and spray de-greaser thinking they were sucked down with a film of oil! Please help! Thanks!