Timm,
My 2 cents but I'd look for something more car seat "friendly". The confer seats are pretty much a straight "L" shape that IMO wouldn't hold a car seat right. I've been chasing rear seats for my 40 for awhile now...The bestop ones aren't bad and they have ones that "fold and tumble". Right now I'm either going to go with a 2nd row Durango seat with the center part cut out or Trailblazer front bucket seats with the integrated seat belts. I've got two older Durango middle row seats so if it works I'll post up some pics. Having a Durango I know how the kids seats fit and I was able to measure for the fit. And, if all works out they will fold and tumble as well

. The issue would be the belts which is why the front buckets out of a Trailblazer with integrated belts would be REAL nice...size wise though they are big (comfy) and might look a little odd...
However, if you do decide to put little ones in the back I would highly recommend a full cage for added safety even if you don't plan to offroad much in the 40