Good score, I would recommend Nisonger or API. The mechanical gauges are pretty much outlawed these days because you don't want pressurised fuel in the cockpit with you as Rick points out. You need to run it through one of these
Mallory FUEL PRESSURE ISOLATOR for mechanical gauges - JCWhitney
If you run a line from your log down in the tunnel and hide the isolator down there then run the line back up into the dash with the
antifreeze in it. I have a neat little bracket that hides it behind the turkey pan on 427's. Don't hesitate to pull the isolator apart and make them a hideaway color, satin black, aluminum or gray. It is just a housing and a diaphragm.