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I run them on 15x8 TJ stock rims and they work fine. Side wall bulge is about right.
That said I have run 31x10.50s on CJ 15x7's and they work fine too. So I would say go ahead and do it. It is listed as an acceptable rim width. You might have to run a little less air on the street to get center bulge out, but that should not be an issue.
I personally like that tire size. I run the older BFG Mud's
I just found out about the Toyo's so I will be keeping them in mind for the Scrambler.