Gentlemen, haven't been here in quite a few years , only Mustang I have left is a '67 my brother bought from Aero on here 15 years or so ago. My father was restoring it when he passed last year so I'll probably get back to it if I live long enough. But to why I am here now, I am restomoding a '66 F-250 that will become an air ride F-100 4x4, and I want to put a Rally-Pac on it, but I want to replace the tac in it with an air pressure gauge, does anyone know what diameter the gauges are on the Rally-Pac. The one I was going to use has turned up missing, either I misplaced it in my shop, which is possible or somebody walked off with it.