I don't believe in rebuilding engines, too many moving parts and far to easy for some idiot to screw it up, this is from my experience.
I wouldn't pull the head, not only can it be warped or cracked but there can easily be tiny cracks that are only visible with magnafluxing.
Just bad luck the engines didn't last.
At this point you cannot afford a 3rd engine failure.
Time for a new car on payments with a long warranty.
New cars are much better made.
Do you want to be working on old cars forever or do you want to have a life?