Clevite TriMetal engine bearings have been the industry standard since the first patent on the cast, copper, lead composition decades ago. The success and notoriety Clevite has earned on the race track proves the commitment to excellence maintained by all who contribute to the Clevite brand. This track success provides Clevite the ultimate proving ground for technologies that yield results in all passenger car and light vehicle applications. Applications include GM - 366 (1966-1998) / 396 (1965-1970) / 402 (1970-1972) / 427 (1966-1998) / 454 (1970-2000). GM Big Block Main Bearings - Clevite H-Series Bearings MS829H.