In your case, putting the Brembo's on will require a custom bracket for the front. You are better off buying the AKEBONO kit that comes on the G37S, it will bolt directly up to your 07 g35 sedan. As far as the wheels go, they will work, but you will have to lower the car and adjust camber accordingly to get the rear to look right as it is an aggressive offset/width for the car. I run the same width/offset in the back of my 2004 g35 sedan and had to go with a 265/35/19 and it fits like a glove. You can read up on the installation of the AKEBONO kit here http://infinitig37.com/akebono-big-brake-swap.html
. That is my car that we are installing the kit on and like you I was in the opposite boat. I had to have a custom bracket up front to adapt the brakes to the v35 chassis.
Let me know if you have any additional questions on the kit.