i used this mechanic to do my headgasket job and egr delete when i blew my gaskets, his price was very fair, and he will do it over a wekend if needed, and he knows what he is doing....this guy works on powerstroke diesel engines every day at his job and rebuilds them on the weekend at his house, he is very good at this, i have sent him many customers that were also happy with his price and the work that was done, send me a pm if u want the contact info for a really good powerstroke mechanic in the DFW area.