Thank you in advance for your help. My loves old trucks and is currently working to restore a 1972 Chevy K20 pick up. We have removed the engine and are looking to identify it. I have attached pictures. It seems the engine code is F I 71. Cleaning it more today. Also we are confused on the other code 14014440 with a 16 underneath and GM on the end. Sorry pictures will not upload. Working to reduce size.