If you are only wanting to add two guages and keep the factory guages in the dash just put them in the glove box. I wanted to keep a factory look but have the additional guages so I pulled the dash (not really that hard took two hours going slow and marking all of the parts) and was able to put in my boost, oil pressure, oil temp in the factory locations and then put my air/fuel and exhaust temp in the glove box. All of them have an audible alarm that you can set depending on your application so you dont even have to have the glove box open and still know if something is going wrong. Additional pics are in my build signature below.
