There are only 2 or 3 sub-10 second GPs, they are both fully built, twin-turbo, stripped out drag cars, realize these are v6's and are not meant to be strip only cars, you better plan lots of time and money and buy another car to be your daily driver, if you do everything to this car that you say you want to do.

Do the top end swap on your own. It's not worth it to pay ZZP for it... Just dedicate a full weekend to it, and you can do the headers etc at the same time. Its not that bad really if you have some mechanical knowledge. I would recommend doing an XP cam at the same time, if you did that and drop to a 3.4" pulley and got a good tune, I think you'd hit low 13's. With an intercooler and a few other mods, drop pulleys again and there's your 12's.