Let's start with this 1970 Ford Mustang Boss 302 found on ebay
2012 Coyote 5.0 liter V8 with 6-speed manual transmission offered for $6,499, plus an ECU/harness for another $1,649. The resulting 420 horsepower will be reliable, tractable, and sound perfect with a free flowing exhaust setup...but...it lacks the maniac fringe that keeps me awake at night.
Here is what you need to shove into an unwanted '70 Boss 302. This is a 2012 3.5 liter Ecoboost V6 from an F150. It pushes out 365 horsepower and 420 ft-lbs of torque...before you add a chip tuner and intake to boost it to 415 horsepower and 505 ft-lbs of torque. It may well weight more than the 5.0 Coyote V8 (once you add turbochargers, intercoolers, and all manner of crazy extra parts, but it makes up for this mass in TORQUES. ALL THE TORQUES.
Anyway, the question is -- is a twin-turbo V6 in a Boss 302 Mustang a sacrilegious swap? And what is the craziest swap you've ever seen. Go, discuss amongst yourselves.