Bonus! Jan 13, 84 build date, and you have the bigger horn button with the silver ring. They made the change from the smaller 83-early 84 horn buttons right around there. That's how you can tell if it's a January or later build car with an original steering wheel.
Wasn't sure exactly when that changed occurred. Best we can determine at the moment it was around early-mid January. Still don't have a VIN break point on that. So far yours is the earliest built confirmed date with the bigger horn button that I've seen. Not that it matters that much, it's just interesting trivia stuff.
My car is another Missouri car, #19, and was originally sold in North Kansas City, MO at H.E. Miller dealership. Small
H/O world. IIRC, when I talked to the original owner on the phone, she said she bought it off the showroom floor sometime around June 84. She had traded in her big azz
Delta 88 in. But the car was built in November 83. That thing sat a good while and she even got a discount on it so they could move it.
Her husband didn't like it because it was small in relative comparison, but she liked it. Then she gave it to her son later... who promptly fugged it up. And the same guy who wanted to buy it back from me when he heard of where it ended up. Which I would have gladly sold it back to him for my asking price. But he didn't think it was worth $6500 after I fixed it all up with NOS door skins, fenders, and a truckload of other NOS GM parts. I tried to tell him that was a bargain for the $$ I had in it and that was my sentimental value for going back to the original owners price. I guess sentimental value wasn't enough for him.