So it looks like an F (serial number, last pic, but a clearer pic woukd help confirm), and your pic in post #8 looks like a date stamp of 70213 (???) which is Feb 13, 1970. In other words, the info that your seeking is marked on the motor but it’s hard for us to help out with unclear pics. If this is another owners rig looking to sell it just tell them you need very clear pics of those two areas. A very common courtesy that’s needed and not out of bounds for asking.