My 66 Chevy 250 six has a code stamped behind the distributor where it is supposed to be. i don't understand the sequence of numbers\letters, as most information I have found states that the first letter is the plant...in my example Flint(F). However most examples state the second digit is related to the date. My second digit is not a number. It is definetly a "I".
Can anyone point me to a good reference? Most of the old searches I have tried took me to dead websites.