I think you'll get mixed views on spacers. I personally have run them a few times in high performance street cars without incident. As long as they are hubcentric, and you check the bolts for the correct tightness regularly you should be fine. As for added stress at the hub, they won't be any worse than a wheel with the same combined offset as the SRT wheel and spacer.
Also, check your state's laws on the subject of spacers. Some states like Utah and Massachusetts deem spacers illegal..
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