Always the catch 22. Luckily, replacement OE style pushrods are very cheap. Find out what the issue is and it may not be a ton of work and money.
If the valves stuck open, the valve guides would be the issue. If this happened at a high rpm, the valve springs are worn, replacements are not to much money. As long as the valves slide in and out easy and do not allow themselves to be pushed side to side more than .0015, they should be good to go.
@MOPAROFFICIAL , that would be a good spec correct? I just wanna double check that.