I doubt the 727, completely. However, I’ve seen the 8 3/4 in slant cars a lot. I had a 72 4 door Dart that had the slant, 904, power disc brakes and 8 3/4 all factory. I have a 71 Swinger slant with an 8 3/4 too. I sorta doubt the suregrip but anyone could have added that.