Hey Sam,
Give MAECO Motorsports a call. They maintain and race prep lots of Cobra's and Shelby Mustangs. My cars previous owner used them many times and was very happy with them. I have been to the shop and was impressed. If I need something done, I would'nt hesitate in using them.
They are @ 18306 Eddy St., Northridge Ca. 91325
off of Reseda just south of Parthenia
818 701 1923
http://www.maecomotorsport.com/
Jason