How to install rocker studs included with edelbrock aluminum rpm head?

After indexing and marking the stud you may want to have the stud grooved for oiling. This is done on small block head studs also. We mill a key slot in the side of the stud that lines up with the oil hole for oilng. We just did a set on a 340 with studs. a must for proper oil to reach the top if not using squirters in the valve cover. You can get away with no groove for so long but time will eat the rockers.