1966 Corvette Big Block Chevy BBC 427 2 Bolt Main Block 3869942 942 L-8-5. IL Suffix Code.
Cleaned and checked for cracks. Cylinders are .030 4.28 bore and look good for build. I don't think it will need bored but you could if needed. There are no sleeves. Block has one weld to repair one starter hole. See last 5 pictures. Starter bolts up perfect and block has been used with a starter on it. Deck has original GM broaching and is stamped but it can be removed or restamp.
513space615space9443callortext
Part # 3869942 Date L-8-5 December 8 1965
Pad # TO427IL. 612180
Thanks for looking and have a nice day!!! 56COFF