Western Chassis billet aluminum driveshaft carrier bearings with polyurethane insolators are available for 1963-72 Chevy-GMC trucks and 1958-64 Chevy Impalas. Built to precise specifications, these high-tech carrier bearings tremendously outlast the OE rubber types. Built from T6061 aluminum with low deflection polyurethane insolators and precision bearings, these key components can handle much more horsepower and torque than the cheap factory replacements. No more yearly replacements required. Note: Works with 3/4 ton GM trucks using the factory-style driveshaft.