Yes, at least on the Chevy. I have an express at Quigley right now. I ordered the removable 4x4 lever so that I can have the drivers seat swivel. It‘s an option at Quigley. I’m not sure about the other conversions. I don’t have any hands on knowledge of how it will work my salesman just told me it’s and option and it sounded like the only option in my case.
The NP273 t-case is electric shift and I’m pretty sure the Borg Warner 1356 can be configured that way too. With either you avoid the floor shifter altogether.
I’ve got swivels on both front seats in my 03 e350 quigley. Quite a few e350 owners do, but you can’t have a drivers seat swivel and the power seat together. Not sure why as it doesn’t pertain to me, but I’ve seen quite a few conversations mentioning it’s not possible.