If you have accesss to a bridgeport mill take a 15/8" endmill and cut a radious in the rockers you'll be plenty safe that way, it can be done with a die grinder but it's alot sloppier, i've do it many time when using big blk. springs on a sm/blk head.

JMO

Zip.

Watch how much this one moves around.

https://www.youtube.com/watch?v=WtqDHJDN79w