7" and 40 offset should be fine. I had scrubbing at the rear when I cornered hard back when I was using 17x7 +35 and 215/40/17. So at +40 I think you'll be fine at the back for sure, roll if need be.
Front just don't dump it stupidly and you'll be right.
Shadowchrome looks awesome IMO. I hate chrome but my 17's were shadowchrome and looked great when they were cleaned.
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