Chevy Roller Rockers

OK this may be a dumb question, so go easy on me!!

I have a set of crane 1.6 roller rockers. These used to be on a motor I had....

But here is my question. What does it take to use the chevy rockers on a magnum motor?
If I can use them in the future, I will keep them.... Otherwise, might as well sell them.
Thanks for your advise!!