I think that you should leave the clean, low mileage blue car unmolested, and buy a clean , low mileage Coyote, when the 2015's are released... And then start molesting THAT one!
Then you'll have TWO cars MB!
I've already got full bolt ons though and started piecing a kit. After that Ill start saving for a newer one next fall.
Plus I don't plan on selling anytime soon, If I don't enjoy it the next owner will. Sadly aren't as low as they use to be lol