On the motor in a friends car that I help with he has these rockers from RB with spray bars. The complete set up is great and easy to work on. This car is a race car and this set up is one of the first that likely Ray did. One other Hemi that we race with broke a rocker and it is not a fun job at the track taking every thing apart to change a spring. Try the grille, rad just for starters because you have to slide the shaft for the rockers out completely out. If you do not make the hemi work hard most rockers will work for ever. Not sure if RB sell the spray bars but I like that application on a race motor but you have to make sure thing are clean and nothing gets plugged. The set up in the picture takes less Maintenance for each rocker set.