[1963c-10]

Near distributor, above fuel pump and stamped into block. Should be something similar to this suffix code F1010UH .....f is flint, the numeric is the date code and the suffix is UH which tells engine hp/and sometimes what trans was mated. Can be helpful on narrowing down the assembly date and maybe application. The section in blue and underlines is what we're looking for.

Sometimes there are 3 letters in the suffix and not two....