You guys worry too much. The ss box that goes in the GT5 location I think is the way to go.
If your rack has been shimmed for bump steer correction you will find a tight fit on the right side rack retaining bracket. I had to modify mine and use a socket head bolt to fit it in and there is zero thousands clearance left.
Make sure that you use an external battery kill switch since there is no way that you can get in there in a hurry to disconnect the battery.
Just my very humble opinion.
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