I just need to know a few places that would be able to work on modified Mustangs in particular. I called Heffner's and they are just doing Vipers now. I know of Horsepower by Hermann but have never personally been to them, although they did do all the work that is done to my car right now, but by the previous owner. And I have been to E.L.D. to buy a few little things here and there but never had them work on my car and have heard they are kinda pricey. So are there any others that anyone knows of that are good with Mustangs???