The GT/CS is an unique package on its own, so I would leave it as is.
I like the 'ghost' strip effect.
But it is your car, so you should do what you like; not what others like. No matter what you do, some will like and others will not.
I am between the Grabber and Screaming (like I think most responses are). Do not prefer the first two, especially based on all the black you will be putting on. With the 2015 color being called 'triple' I think you will find it is probably a multi-layer color (those are too much trouble to lay...
This is who I used to rebuilt my engine: Pro-Formance Specialties - Home
They do a lot of race engines and a lot of Fords (among others). They are always busy, so it can take a little bit to get in their queue; but Matt was great to work with. The only thing is that you have to get the engine...
What do you mean by "Redo engine compartment"? Do you need the motor taken out? Do you need the motor rebuilt? Do you want it to be re-painted?
I recently did this on 64 1/2, just had someone else to the rebuild. It is fairly easy to do yourself. The shop let me borrow their lift so a couple...