Hey guys i have a set of harland sharp roller rockers layin around and was wondering how you can tell what ratio they are, i dont think that they are stamped.

I have a mti X1 cam which is almost 600 lift and at the end of the month i am putting on the prc ls6 heads. Would these be safe to put on my car ?TIA fellas

 

I wouldn't guess... pistons meeting valves gets ugly

 

Call them up, the numbers on the website. Ask for Jeff, perhaps he can help you identify them.