The ford rocker are good ..over priced but good . I know you hear bad stuff online about guys breaking the proform rockers but i have seen them last for years with no problems. The problems with breaking rockers are half and half... if you run the wrong springs or the push rods are too long or sometimes too short you will break any rocker arm..no matter what brand name. I have seen high dollar rockers break the same way cheap one break..sometimes it comes down to install and the right parts that will work well together and the right person doing the work.