A few questions...
 

Hello I drive a 08 v6 and I'm looking into doing a few things to it... Would I be able to mount up 2013 18" oem mustang gt five spoke rims that are 235/50-18 or do I need some type of spacers for them, I have stock suspension as well... I'm also looking into running hids but I have drls is there a way to turn them off??? Would I also be able to run hids in those gt style fog lights that a few places sell online??? And which is the best place online to shop for accessories?? Thanks have a great day.

Don't have any advice on the specific things you want to install, but I've had great luck on eBay finding all the things I've wanted/needed for my car. Never had any issues with fit either.

edit-
sorry i didn't see it was 2013 wheels...
sorry

The wheels will fit, same offset from 2005 to date.

Yes you could run HIDs in the fog lights, check out www.cjponyparts.com, www.americanmuscle.com, there is a few places check out vendor section also.

Thanks everyone