Ok, new 68 T5 Mustang owner here. I've done engine spec research and figured out how to read my date code..... First number is year, then a letter is the month of that year, then second number is the day of the month..... Mine is "5B10S". I.e. Build date is Feb 10 of either 65 or 75.

What does the "S" mean?

Help wanted, thanks much!

 

Welcome to the forum, and congrats on that new to you Mustang.

You'll get more responses if you post this question in the "classic" forum. Good luck

 

Will do, thx!

 

Welcome to MF and you'll get more responses in the "Classic" section.