A complete set of new .030 under connecting rod bearings. According to parts book they fit Olds 6 cyl 37 thru 48 (my parts book is a 48). Please read the following. I bought a newly rebuilt engine at auction from an engine rebuilder that went out of business. Wanted to inspect it before installing in my car so I disassembled it and found 7 internal cracks in block. Now we know why he is out of business. So I am parting out the engine. All new parts, engine was never ran. I am not a dealer, finished my restoration (46) and selling extra parts collected over the years. Thank you for looking.