Seat belts go in perfectly.
The seats are designed well and pass through the door and then four or so bolts to put it back together.
The very worst happening will be a kicker board needed, a 2x4 in front of the sofa if your slide(if you put it in a slide) isn't deep enough.
There are number of youtube videos you can watch which will bring you to a comfort level you're comfortable with.
Do not think my link is the end all of furniture.
It's just a taste.
The sky is almost the limit.
Power leg rests on the front seats, air ride, power seats... It's a fun education you can completenin a few hours.
Search youtube for
Newell rv tour and take a look at the options available in seat coverings.
Good luck.
You have been a pleasure in this thread.
Slight aside
We were looking for front seats from an f150 king ranch.
We have about a 40,000 mile 'butt-time' in them and knew we'd be fine with them.
Wreck Car and truck seats are an option.
Lincoln 31 way seats were on the short list for a while.