Ya know, I was thinkin. Dangerous, I know. If the stang was originally a straight six car, the swap woundn't be too difficult. And since you'd still have plenty of side room, one or two turbos would fit well. However, the brakes and other performance features wouldn't stand up to a HiPo motor. Swapping a rice grown 6 in place of a corn grown six may boost hp, but you still have the crappy, unresponsive, prone to problems DRUM brakes up front. Also, if you're going with discs up front, you might as well put the 8 in.
my .02
~Critter
my .02
~Critter