Thanks, everyone.
The back seats do go down, but there’s a metal piece that has a hole cut out making the access to the back seat from the trunk a bit smaller.
The current owner gave me the dimensions, and I know one will fit across the back seat, and I’m pretty sure the other will fit laying down on the passenger seat, but even with a tape measure I had a hard time visualizing it. And since he’s a few hours away I was hoping someone here had transported a pair in a medium sized sedan.
Cheers,
Mamoru