Valve Spring - Broken problem found

So now what comes next? That valve has likely been tapping on the piston and may be bent!
The piece of "debris" used to be a spring shim (not made out of hardened steel). Do you have a way of testing cylinder sealing?
How far from Swift Current are you?
Going to have to pull the head off and see what kind of Tomfoolery and damage has happened. No way of testing cylinder sealing, but I think that is erroneous, since the heads got to come off.
I am about 3 hrs strait north from Swift..........why, do you have some nice rebuilt heads for sale for a 340? LOL

Pull the head off

Will have to do that when I get time.........busy time of year for me, so not sure when that will happen.
Should a guy rebuild the whole head with new parts while it is off or just fix what is broken? This car is with me for life, but I didn't want to dive into a motor rebuild/performance build yet. Should I just slap on some new heads and be done with it and the worrying if more of this head is going to fail or the other head fail as well???