Clevite GMC Pass & Trk 400 6.6L 1970-80 Main Bearing Set

If you're rebuilding the bottom end of your 1970-1980 GMC or Chevrolet truck or passenger car with the 400 cubic inch (6.6L) engine, this Clevite main bearing set is what you need. These bearings are a critical part of your engine's rotating assembly, supporting the crankshaft and ensuring it spins smoothly within the block. When you're going through an engine, replacing these is a standard procedure to ensure longevity and proper oil pressure.

Clevite is a well-known name in engine components, and this set is built to meet the demands of a rebuilt engine. The 'H' in the part number MS1038H1 indicates a high-performance overlay material, which offers improved durability and wear resistance compared to standard bearings. This is important for maintaining consistent oil clearance and preventing premature wear, especially in engines that see regular use or are built for more demanding applications. This set is designed as a direct replacement, meaning it fits right into the factory main bearing saddles.

When you're installing these bearings, remember to carefully check your crankshaft journals for any imperfections and ensure proper lubrication during assembly. This set is designed for the 1970-1980 model years across a wide range of Chevrolet and GMC vehicles, including popular models like the Chevrolet C10 and GMC C1500 trucks, as well as passenger cars like the Chevrolet Impala and Pontiac Grand Prix.