Forgive me if I'm wrong, but I don't see a front splitter on your car. I fail to see how the car will handle any better with 900+ lbs on the rear without downforce on the front also. As a matter of fact, Dodge even ADDED another set of dive planes on the ACRX.
Car looks sweet though.
It will never see 900+ downforce on the rear. The split is about 40/60 front/rear. So at most 600lbs at 150mph. The extra set of dive planes on the ACRX adds about 50lbs of downforce to the front end.