I agree that today anything can be made fast. Unless it was in the high country, I would be shocked at a 383 RR not being able to get into the 14's (unless it had major traction issues). My 1st post showed a heavier C-body with taller tires (15") going 15.17 and that was with the "run of the mill" 3.23 gears that would have been a standard gear on the RR.