That level of effort could be put to much better use. carbon fiber/tubular unibody, 4wd, something with a point beyond being unique. Every possible benefit of mid engine is going to be negated by the compromises you will have to make to do it one off at a price that's not astronomical.
Antihero
Putting AMS garbage, and $500 ebay wheels on a Z is like dressing a Victorias Secret model in a Walmart dress and Payless shoes. You're embarrassing yourself.