the heads are from a 350ci, 72 up [june 18, 75 or 76?] so could be 76 chevelle 350
that number from the pad needs a engine prod list book and indicates exactly what the application was and what equipment was originally on it, if someone has the book they could decipher it, but there'll be a number cast on the block that'll show what the block is and date too - no doubt 350!
Bill
