The link is blocked by this site. A little too paranoid there but,,,, If the rockers are the adapter type that attatch with a bolt you will be fine. You will have to manually adjust your valves the first time and make sure the rocker tip is positioned properly on the valve tip. You will also need valve guide plates if they don't come with the rockers.
You probably will not notice a perforance increase but they do reduce friction and wear.