yes that mustang is NA. no nos or boost .i just went to help him get it home tonight after he tore out the transmission again. a couple years ago i had to fix the frame on it after he hit a deer at 140 mph. and it was messy!
its a 302 stroked to a 347, roller cam and some good aluminum heads. it was fuel injected but he went to a carb a couple years ago.
so i gotta believe a 408 mopar could do that !