This listing is for a brand new set of Clevite77 rod and main bearings that are made in the USA. Part Number Mains: MS909P10 Part Number Rods: CB663P10 They are the P Series of rod and main bearings for crankshafts turned .010" under size. They are compatible replacements for Chevrolet & GMC V8 engines in passenger cars and pickup trucks. 262 CID (4.3L) 1975-1976 All 265 CID (4.3L) 1994-1996 All 267 CID (4.4L) 1979-1982 All 302 CID (5.0L) 1968-1969 All 305 CID (5.0L) 1976-2002 All 307 CID (5.0L) 1968-1973 All 327 CID (5.4L) 1968-1969 All 350 CID (5.7L) 1968-2002 All Including Vortec, LT1 & LT4 LT1 LT4