On my boosted G35 (supercharger, then twin turbo), I had my coolers in both locations that you're considering. The wheel well is the best location, provided you can get air flow to it. I don't know what bumper and/or ducting options you 370z guys have, but I can tell you from experience that you will have better temps if you can avoid putting heat exchangers in front of one another.
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2013 G37 IPL Convertible
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