Sadly, Ken Miles would die in his Ford due to a mechanical failure which questions the handling capability if their design :(
Ford beat Ferrari because they were able to design a faster motor on the straights, but Ferrari had better handling in the corners, neither car handles "the same" which...
2WD correct?
Did you upgrade to a sealed diff? I believe the stock diff is not sealed.
If you have a sealed diff then anywhere between 2K to 5K is your "tuning window" with the following behavior within that range, only look at the rear option in the chart below where I would start with 3K...