Swapping in an ecoboost 3.5 would be a nitemare, besides the injection limits the HP, there have already been companies to upgrade the turbo (yes a larger single variable vane turbo) that maxed out around 550 crank HP due to fueling limitations.
Turbo install on the 3.7 is a breeze compared to other cars, I know, I did it and although I am smart I can't weld much past tacking stuff together. Factory manifolds work fine, flip the DS one over, move the studs around, replace one stud with a bolt and away you go, a 2" cross over works fine. I have a 3.5" downpipe but a 3" one will be fine, split it back into duals. Find a local fab shop (roll bars, turbo installs, etc) and talk to them, look over my build pics, CFM's pics, Cal Hartlines build pics and go from there, I can sell you wht you need but I won't build it for you, parts wise you are looking around $3k.
13 V6 Coupe Base MT6
Home built 62mm Turbo Kit
"Old Bo and Luke didn't need no GPS or big old fancy computer cause the one thing those old Duke boys were good at was finding Cooter!"