Sorry about posting late, I was out of town.
The only thing I had to change to mate it to the 7.5 was to build the mount that goes on the rear end cover. The holes did not line up by about 3/8 of an inch. The roll center is dictated by the rear panard bar setting and of course we are playing with spring rates and sway bars then trying to get the car even. We are going to 400 pound in the rear with a .750 sway bar. That is subject to change with further testing, but that is where we are now. We started off with 750 fronts and 325 in the rear with large sway bars front and rear, however we were having issues with camber gain in the front and bump steer issues. We are moving up to 900/400 and smaller sway bars and see what happens in Savannah.