After even the best aftermarket Gen III Hemi valvesprings failed, Joe Jill realized the root cause was the Hemi's beehive valvespring configuration. Despite the slight advantage of having lower mass than conventional straight springs, there's no arguing with the epidemic of failures. The solution is a conventional straight spring. But as we see in this photo, the underside of the Hemi's cast-steel rocker arm is designed to work only with 0.900-inch-diameter beehive-style retainers and interferes with larger retainers (pen points). This is as far as the rocker will drop before hitting the retainer. Clearly something must be done.