The repair was to a 1990 Ford 2.3L head. They pressure tested the head and also ground down the head to make it flat. When I went to install the head, I couldn't find the timing mark on the Sprocket. They had the Sprocket on backwards. They also tapped a bolt hole, for the Oil pressure sensor wrong, I assume because they stripped it. So now I had to plug that hole and now I don't have a oil pressure sensor. This is what they specialize in and they couldn't do it right.