Rocker to Retainer with Pictures

Do NOT grind the rocker. Your springs aren’t big enough to warrant that, and it should NEVER be done.

Figure out why the geometry is off and fix that.

If you need help talk to Mike at B3racingengines.com and let him help you.

The rocker arm is no place to use a grinder.

Exactly this^^^^^ If you grind something, you're doin it WRONG. The rocker shaft needs to be relocated. As mentioned, Mike at B3 can help make that happen.