65 Dart manual steering box

Avispa said
I guess I'll start removing the steering column, and I noticed I have the Rare optional upside down steering wheel, by the way no roll pin to decouple the the coupler to the steering box, it's a nut and bolt with a notch in the shaft to lock it, at least in 65 that is.

I've seen that in 64's maybe you got a carry over. Does your coupler have a perfectly rectangular end or does it have a rounded center? The rectangle box couplers took a different seal thats shown in Avispa's nice pic. I could slide the column up 2 inches in my old 65 Barracuda, I didnt even have a seal on mine! Only thing stopping the entire column from pulling out was the groove in the column shaft where the under dash bracket bolted up.