Hey man, congratulations on the FX. I've never been to his shop, but I have a buddy who takes his G35 to JTran as well. Jumbo had Powerfab do his turbo work. I think they are both in north Houston. Sal's works on G's and Z's and they are on 290 near the belt. I've only been to them for fender rolling and I got their lifetime alignment. They will work on your car even with spacers.
I'm not far from you, I live in north Katy, near Fry and Clay. But I travel up and down Mason pretty often to get to my folks house in Grand Mission.