Child Restraint conversion.

Have a look at this thread:
http://www.forabodiesonly.com/mopar/showthread.php?t=80675

Very interesting in my opinion. He used seats from a Volvo that have integrated shoulder belts.

As for being safe for kids... there was a guy on here that got his Duster CRUSHED in between 2 trucks with his munchkin in the back, from what I remember he was a little shaken up but nothing major. Even with that said, I did change my 73 2 piece belts out for the one piece 75+ type a while back ( for safety reasons ) and would definitely consider the same type of mod for the rear seats if I have the opportunity
My oldest calls my duster "the screaming metal deathtrap"