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It looks like the back of the rocker has broken off. That is a pretty normal issue with an aluminum rocker like this on an LS engine. This is one reason everyone always recommends using the factory rocker with a trunnion upgrade.
You need a set of OEM rockers. Crane is not the OEM rocker arm for an LS engine. You can get them new, or just find a good used set, then install the trunnion upgrade.
There are also more options out if this is not something you want to do yourself. You can give us a ring and I will be happy to point you in the right direction.
OP hit Matt up man! All the guys at Tick Performance are rock solid! I honestly don’t think you’ll find better customer service in the industry! They went above and beyond for me and I’m no special that’s for sure! Someone is giving you some bad info that’s for sure. Good luck bro🇺🇸