Sorry for the delay, life happened. Here are some pictures with our rear facing car seat.
Fully reclined:
When the car seat is fully reclined back, then you can not move the passenger seat fully back. See this video, it starts off with passenger seat all the way back.
Google video: carseat-passenger seat
But in the middle recline position of carseat, the passenger seat can go all the way back and still not hit the carseat.
Moving the carseat to middle position.
Moving the passenger seat all the way back. It is almost touching.