looking to install boost pyro and fuel pressure guages in my truck, I went to the local diesel shop and was guoted $600. 00 for the boost and pyro guage, they wouldn't do the fuel pressure. This seems kinda steep for me but I'm a little leary of drilling on my new truck. any one in the Central Texas area installed these guages that might be able top offer some insight as to type of guages to purchase and problems encountered with the install?