Blazer seating question

[chuggernaut]

Long, long time lurker and admirer. Now that I think about it, this might actually be the first thread that I've started here.

Here's my situation -- I've found an attractive deal on a '72 4x4 Blazer about an hour from me, but if I'm not mistaken, it'll only seat four. Problem is that my wife and three children are all going to want to cruise with me.

Temporary Solution -- Considering their small stature, I could probably put a third seat belt in the back, but it would only be good for short trips and they'd eventually outgrow it.

Thinking outside of the box, would it be possible to buy a second rear seat and install them sideways?

I figured if anyone's going to know, it'd be you guys. Thanks in advance.