Heck, if they're pulling your head off to do the valves, you might to think about taking care of the bottom end as well: rings and bearings at least...
I'm dang glad I live today vs. anytime in the past, for both simple things like yellow stickies and SPF labelled sun tan lotion, and then the repair services that are available, even though they don't use OEM parts. Good fortune to you and all of us. Doug