1968 18 Spline Transmission

Hey folks, I am putting together a 65 Coronet and acquired an 18 spline transmission for the project. In consideration of the fact that people who are looking to mate a transmission to an original car, thought I would post the information here before I move forward.
It has an April 25,1968 dare code and was installed in a car built in the Lynch Road plant so probably a charger. VIN information is BA280403.

What motor are u using. I don't believe 65s had 18 spline.

^^ I think he's offering up the trans to the owner of the car it originally came out of (should it still exist).