Asking for Advice Fix 273 or Replace

I plan on doing a compression test on all 8 before I pull the motor, I was wondering if this will kinda tell me 1/2 the story, I do know that if the test fails it most likely is the rings and then it will need to be pulled. If the test pass I was wondering if it could be the heads need repaired and rebuilt. Would someone please advise me on what to look for and what path to take, if the compression looks good....
Thaks