You can run them. I'm using the same tire size on my 2006. I've never had a problem with them rubbing and it only changes the MPH by 1 MPH when doing 60 MPH. They shouldn't be narrower though, just slightly wider.
I pulled the 235/70's, 235/75,s and the 245/70s down and set them side by side then tread to tread. The 75's were definitely taller. They appeared slightly narrower, but it was marginal. If I try them, I'll let you know how they do. Thanks for the input.