You must have roller tip rockers. I assumed you meant full roller rockers, with roller bearings instead of "that half dome peice" (pivot ball). With the quality of metallurgy seen in inexpensive Chinese products, you may still have problems with them. Lets hope not.
BTW, roller tips have questionable value. Motion studies by Edelbrock showed they don't rotate at some engine speeds, and rotate backwards at others.
[This message has been edited by Tugboat (edited 03-11-2004).]