Will Ford dealers work on Coach with 6.8-liter V10

I use to have my local Ford dealer do oil, filter & lube but I found out that they didn't know where all of the grease zerk were or the emergency brake plug was and they had to work on it outside on the ground. They recommended a local truck repair center. They did a lot of work on Ford V10 trucks but now is out of business (health problems). There is a local tire place that can do the oil, filter & lube but beyond that I don't know where I'll be getting future service.

Dave