Can a 4 door Dart be a cool hot rod?

Old man and his wife in town drive around a pea green '73 4 door as their only transportation, ive asked him about it before and he says he dropped in a built up 360 and 8 3/4 with 3.55 gears 30+ years ago!! got to crawl around it last week.....sure enough 8 3/4 and a pretty tricked 360...bucket seats out of a 70s van... no one else even gives it a second look in town.