Doing a top end rebuild and using the full Vesrah gasket set. Comes with these 8 green o-rings pictured, but not sure where they go. As there are 8 of them, thinking these might be the ones under the valve guides? If so, I haven't had those out, so shouldn't need to replace, right? Just had a sad thought - baked the head with those in... really hope it didn't damage them!