1310kg = 2872lb, but that is, I think, the racecar weight. Anything under 3000lbs would be a really strong result. Mclaren claimed all kinds of super-low weights for their 675 LT, but when a magazine actually weighed one it was a lot fatter than the claims (I think around 3100lbs). There's tons of bogus ways to weigh cars, e.g. without any fluids, or totally stripped interiors rather than with normal options, etc. if Ford can get sub-3000 ready to drive that would be amazing.
It still needs waaaay more than 600hp though!