I would test in stages if you have the time, brace then seat or seat out then brace.
If tracking the car I found with my 225 race tires and BBK's I could brake very late at 130 MPH but the rear of the car became unsettled a bit unless I had the tank at least 5/8 full, the lower it got the more the rear loosened up.
Rear seat, spare, trim out of the car, 8lb battery in the back, all the excess weight I could find to take out under the hood, oil cooler and J-Line IC.
With the DHM bumber beam and IC it will help as it took quite a bit more weight off the front as only 4lbs heavier than the stock IC and bumper!
I get the idea of point and shoot, I have done that in FWD autocrossing using a bit of Scandinavian flick even on higher speed layouts, much fun
Be careful as the stock alignment is setup for over steer and you could lose it if to aggressive working up to higher speeds.