With extremely aggressive cam profiles and high spring pressures, stud-mounted rocker arms require a stud girdle for strength and stability. These are a pain, so we opted for shaft-mounted T&D rockers when we built this engine. After all this street abuse, these rockers, which were engineered for race engines, still looked and felt great. We sent them to T&D for a thorough inspection and rebuild. They inspected the aluminum bodies and steel shafts for any excessive wear and cracks. T&D replaced the needle bearing assemblies, roller tips, and 13 of the pushrod cups.