You can use the factory hard vacuum line for the map sensor. You can ground to the black wire that came off the factory boost gauge harness, use the white wire on the factory gauge harness to supply lighted power to the Autometer gauge, and then use either of these two blue wires for ignited power...
BTW, that's the back of the fuse box. you'll have to pull it out to access these wires.
Autometer digital boost gauge install?
Linear Mode
