Yes, its the 71 Charger guts.
I'm not a Mopar guy by any stretch. I guess the engine bay from 68 RR or 70 Coronet would have been correct then? Just thinking out loud.
Iove the old 911's. Your build looks great the way it is. I hear ya on wanting something different. I've been wanting the same with some of my recent builds. Again, great job all around on this one!