Manufacturer: Clevite 77 Mfg part #: SH1349S Clevite 77® cam bearings are precision bored to eliminate the need for machining after installation. This exclusive bearing design features a steel backing for support, a cast-copper lead alloy center for strength and durability, nickel dam for chemical stability, and an electroplated white metal babbitt overlay for slipperiness, conformability and embedability. The intermediate cast-copper lead layer creates and interlocked columnar structure capable of withstanding much heavier pulsating loads than any other bearing design. Features: # Enough cam bearings to do one engine. # Fits SB Chevy 262/265/267/283/305/307/350/400 engines. # These bearings are for use in heavy duty applications. Durabond cam bearings may also be supplied.