727 identification numbers

Lefty71 said

I assume you got this fugured out over at FBBO yesterday?? The 3681053 and 3515841 numbers are your application for the trans.. 4221 and 3496 will tell you in a 10,000 day calender the date they were built.... the last two four digit numbers are not important for your query.

https://www.mymopar.com/downloads/transguide.pdf

Chrysler's 10,000-Day Calendar

Click to expand...

Yessir - And thank you very much for taking the time to help me. I searched on - line for hours and got nowhere. Thanks to you and everyone else - I finally understand it now. It's first set/block of 4 digit numbers that tells us the year. I really appreciate you and everyone here very much. Have a great day Lefty71.