Clevite 77 CB634P-30 SBF 289/302 Manufacturer: Clevite 77 Mfg part #: CB634P-30 P-series parts are the oldest series of Clevite 77® High Performance Bearings. The rod bearings in this series typically have the greatest amount of eccentricity. These rod Bearings have high crush for maximum retention and a reduced overlay thickness to prevent overlay fatigue sometimes referred to as hen tracking. They also use a hardened steel back for added strength and resistance to fretting. # Features: Enough bearings to do one V8 engine. # Fits SB Ford 289/302 with 2.123" rod journals. NOTE: Designed for crankshafts with .030" undersized rod journals.