Need advice on rocker arms!

[truckin 79]

I am no expert but I have messed with a few small block chebbies. You could just replace rocker but I would definitely rotate engine a few times at crank bolt with a ratchet. I would watch and make sure the rockers are not hitting the front of the rocker stud. I have never seen one just crack in front of rocker like that. I have seen them split in half before from over tightening. Check the push rod for any marring or other damage. Roll it on a flat surface to make sure it is not bent and you could probably still use it