Integrated Shoulder Belts, front and back?

Has anyone here ever tried using the seats out of a Chrysler 200 convertible as replacements in their A-bodies?

I have seen the Sebring swap a few times, but am not a fan of how high the shoulder belt pillar is where it is as tall as the head rest. The 200 Seats have a much more understated setup that I much prefer in terms of looks, but I am wondering about fitment.

Also - I haven't really seen much about back-seat updates using modern setups to give rear-seat occupants (read kids) shoulder belts and head-rests. Given that the A-body back seats are pretty narrow (it looks downright tiny in my Barracuda), I'm wondering if anyone has come up with a swap-in solution for head-rests and integrated belts in the rear?

My rear seat doesn't have integrated seat belts but my solution solved the "kids problem", head rest and all!!
I bend a piece of 1/8" X 1 1/2" flat stock to follow the shape of the back seat and used the flat stock to mount my shoulder harness seat belts and also to install a head rest. It also gave me a place to mount some 1/2" plywood for my 12" speakers and 500 watt amps. Everything is nicely hidden behind the rear seat while keeping the stock rear seat look.

I did try mounting Sebring front bucket seats in my daughter's '59 Studebaker Silver Hawk and ran into many problems. Some years of Sebring seats have an integrated "impact module" that locks the seat belts during a crash. The module is hidden inside the Sebring console. The seats have multiple locking features that are difficult to defeat even with the wiring diagram. The inside belt receiver also has an explosive device which is ignited during an accident causing the seat belt to tighten (it's a one time use type of device). I'm sure someone has used these seat belt mechanisms before it but it was hardly worth the trouble and I didn't want to risk my daughter's well being on a seat belt mechanism that wasn't as the factory intended.
treblig