i guess what I am asking is would a small block from Flint have the identical style as far as font and size as a big block from Tonawanda? I am saying they are but by buddy says the big blocks had a totally different font and size of stamp. How did the fonts differ?
Your buddy is misinformed - as I noted above, the engine plant stamp font SIZES were the same at all engine plants (that was specified by Engineering), but the font STYLES could differ, especially for the number characters, depending on which supplier the dies came from. Nobody in the engine plants paid any attention to font styles - all that mattered was setting up the date and suffix correctly in the holders at the start of the shift.