Electric choke TQ

Is that Chevy arm convertible with parts robbed off another Mopar TQ,
Not fully. I don’t see why you can’t swap things around.
or does it have to be de-coupled from the throttle-shaft? or
can a guy simply swap in a Mopar baseplate?
From what I’m seeing, it does look like you could swap base plates easy enough. It appears that the only difference in the base plates are the vacuum line locations and what they are.

The Chevy TQ has timed/ported & PVC up front and a P/B in the back.
The MoPar TQ has the same front and a small vacuum port in the back.
Everything else looks the same.
And
Is that choke All-Electric or heated air assist off the exhaust manifold?
All electric. It is a 1 hot wire feed. That’s it! BAMM baby.
You got a track-kit to go with that, with a M-rod selection?
Negative on both. The do have some extra jets and rods for the regular TQ. It’s been a long time since I had the Chevy TQ apart so to be perfectly honest, what style is inside, I don’t remember.

I used the Chevy TQ for a while up top a B 400. When I took it off I drained it and blew it out IIRC. It’s what I have normally done anyway.

The other MoPar TQ needs a kit and cleaning but it should otherwise operate as intended. I have not run this particular MoPar TQ myself.