IF this is the case and you've confirmed there is no damage on the pistons the valve should be ok. I lost 2 on my diesel it's interference as well, it didn't hold them open enough to make contact. Mine just wouldn't open or close all the way, ran like garbage and made a tone of "death noises". fixed the issue and got right back on the road. Pull your valve covers and take a few pictures for us.

1999 Montero SAS'd on Kings and stuff

1998 Montero trying to get a V8 Swapped