It's kinda like the Elec. Oil pressure gauge from Autometer, which comes with a sender.... Here's a picture of it. I see the pressure relief valve at the top that you guys are talking about, but that won't work for an electrical gauge. What about the place where this plug is in the picture? That looks like it's a fuel line (assuming I traced the line correctly
)
Btw, I'm not going to be putting the turbo in myself.