The last I heard was no US telephone number. A couple of things, take some cash for a down payment since you'll be a new customer. Also empty the car of tools AMMO or anything gun related. Take the title and registration and get Mexico insurance as it is mandatory. Make sure to have their phone number handy if you get stopped by Mexican customs so they can explain why you are bringing a "heap" to Mexico. Here are a before and after shot of their work, took 6 weeks, $2K.
