My Fuel pressure is electrical. Oil and Boost mechanical. Even though the Boost is an air/fuel mixture, I don't expect the line to leak. Same with the Oil line.
I think my next winters project is to replace all the dashboard gauges. My speedo doesn't work and neither does the tach. The tach on the top of my dash does work and that's the one I look at along with boost, fuel pressure and lean/rich fuel mixture gauges. The temp, volt and oil pressure gauges are mounted on the tranny tunnel hump to the heater/fan box. They are visible there with just a quick glance down.
For the dashboard, I'll be replacing with all electrical. It will mostly just be the speedo, gas gauge and some warning lights.